AVICI SYSTEMS INC - 10-K Annual Report

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes x No ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. x

Indicate by check mark whether the registrant is an accelerated filer (as defined in Exchange Act Rule 12b-2). Yes x No ¨

The aggregate market value of the voting stock held by non-affiliates of the Registrant, as of June 30, 2004 was approximately $161,644,353 (based on the closing price of the Registrant’s Common Stock on June 30, 2004 of $13.00 per share).

The number of shares outstanding of the Registrant’s $.0001 par value Common Stock as of March 4, 2005 was 12,945,930.

The registrant intends to file a definitive proxy statement pursuant to Regulation 14A within 120 days of the end of the fiscal year ended December 31, 2004. Portions of such proxy statement are incorporated by reference into Part II, Item 5, and Part III of this Form 10-K.

Avici Systems Inc. provides high-speed core Internet infrastructure equipment that enables telecommunications companies and Internet service providers, referred to as carriers, to transmit large volumes of data across their networks. Our high-performance routing solutions are designed and built to deliver the scalability, reliability, and performance that carriers need to support a wide range of applications while lowering the total cost of building and operating their core data networks.

The Avici core routing product family consists of three chassis and line cards to provide carriers with flexibility in selecting a product that best fits their needs. We offer customers three different equipment configurations, the Terabit Switch Router (TSR^™), the Stackable Switch Router (SSR^™), and the Quarter-rack Scalable Router (QSR^™), and each chassis is configured with our line cards and proprietary software to support a range of speeds, protocols, and carrier services. All three chassis use the same line cards and software to enable carriers of every size to take advantage of Avici’s unique carrier-class technology. Our core routers are designed to provide our customers:

We utilize a direct sales force to sell and market our products to many of the large incumbent local exchange carriers, inter-exchange carriers, and postal telephone and telegraph operators globally, such as our existing customer, AT&T. We also market, sell, and support our products through systems integrators, sales agents, and distribution partners, including Nortel Networks and Huawei Technologies. In January 2004, we entered into a worldwide strategic relationship with Nortel Networks to market, sell, and support our products. In May 2003, we entered into a strategic relationship with Huawei Technologies for sales and support of our product in Greater China. We also have additional regional channel partners in Europe, Japan, Asia, and Latin America.

Avici was incorporated in Delaware in 1996 and held its initial public offering in July 2000. We are headquartered in North Billerica, Massachusetts. At December 31, 2004, we had 195 employees.

Traditional carrier networks were primarily built on technologies to support voice services. These legacy voice networks used circuit switches, which dedicate an individual connection, or part of the network, for the duration of a call even while there are pauses in the conversation. As the amount of data traffic carried over the network infrastructure increased, carriers sought to increase the efficiency of data transmission through their networks by adopting packet switching technologies, such as Asynchronous Transfer Mode (ATM) and Frame

Relay. Packet switching technologies enabled carriers to send data from multiple sources on the same connection, substantially reducing the network bandwidth wasted using traditional circuit switch technology.

In the 1990s, the Internet created a new era of innovation and growth in the telecom industry. In an effort to build out and rapidly expand their data networks to support increased traffic, carriers invested in IP routers, and IP emerged as the leading protocol for supporting residential, enterprise, and carrier networks. IP’s growth was largely driven by email, web, and basic data transfer applications, which permit intermittent and delayed transmissions of data.

Carrier IP networks are now expected to support mission critical services such as voice, Virtual Private Networks (VPNs), online gaming, security, storage, and other business and residential applications. These types of IP services are required for carriers to increase revenue and profits. However, these applications require significantly higher levels of reliability, scale, QoS, and performance. IP has a relatively poor record of reliability and performance, compared with voice and ATM networks. This is because traditional routers that supported the initial build out of the Internet had an enterprise heritage—they only needed to support basic connectivity and not the demands of SLA-compliant services. Furthermore, as IP traffic increased, the capacity constraints of these traditional routers forced carriers to cluster multiple routers that use valuable interfaces to connect to each other or perform forklift upgrades to new higher capacity chassis. Some carriers have also had to add a separate aggregation layer between the edge and the core of their networks to combine multiple lower-speed connections from edge routers onto a smaller number of higher-capacity connections. Carriers were required to deploy duplicate or redundant routers in every Point of Presence (PoP) to improve reliability to acceptable levels. These measures raised carriers’ capital expenditures and added operational complexity to the network, requiring more personnel and expenditures to adequately maintain the network. Today, a maturing Internet is placing new demands on routers.

Over the past several years, we believe that carriers have experienced a near doubling of IP traffic each year. As IP is increasingly used to support more diverse and demanding applications, carriers require routing platforms purpose built for the carrier network. Carriers recognize that they cannot cost effectively support multiple networks—one for landline voice, another for IP traffic, another for wireless, and many more for separate data networks such as ATM. Carriers envision a converged IP network where voice, data, video and wireless services are supported over a single reliable and cost effective network. This vision requires upgrading existing best effort IP networks to a new-real time IP network powered by carrier-grade IP routers to improve the economics of the IP network.

The core routers that run carrier networks must evolve and support a new model of system availability where they match the standard reliability of legacy telephony and data networks, scale in service to extend network longevity, keep pace with new traffic requirements, and deliver the levels of service and performance to converge legacy networks over a common IP core. As a result, carriers are demanding solutions with the following attributes:

Carrier-Class Reliability. The equipment that carriers deploy within their networks must offer the highest level of up time and redundancy. To meet this requirement, known as carrier-class reliability, router designs must minimize any single point of failure and provide automatic recovery from network disruptions and device errors. Carriers require the ability to recover from service or network disruptions in the sub-second level and 99.999+% total system availability in core IP routers.

Reduced Network Cost and Complexity. A significant portion of line card expenditures relating to the deployment of traditional routers is dedicated to the interconnection of multiple, fixed configuration routers in order to provide for the required amounts of capacity. To reduce costs, carriers require that every line card be dedicated to revenue generating customer traffic and not the interconnection of routers to each other. Furthermore, the more routers involved, the greater the ongoing operational costs of running a network. With

each addition of a new router, the complexity of the network’s design and management increases, as well as the number of personnel needed to manage the network. As a result, carriers are demanding modular solutions that scale in service to accommodate new capacity requirements, reduce the number of devices and, consequently, the forecasting uncertainty, complexity, and costs of operating large capacity networks.

Faster Service Provisioning. Networks and service demands are changing constantly, and carriers require a cost-effective means of increasing capacity and offering new services on a continual basis. Routers must have the ability to expand capacity in-service without the costly delays caused by forklift upgrades, complex network reconfigurations, or other significant disruptions to the network.

High Performance. As carriers consolidate existing legacy services and deliver new services on the IP backbone, they must provide Quality of Service, or the ability to prioritize different traffic types in order to meet service level agreements to customers for premium services.

Interoperability. Due to economic constraints associated with upgrading an entire network to accommodate new technologies, it is critical that new network equipment support the protocols and devices already deployed in carrier networks.

Instead of utilizing interim solutions that provide only incremental increases in capacity, carriers are seeking longer-term solutions that will enable them to cost-effectively build networks designed to capitalize on the opportunities created by the growth of the Internet and the proliferation of data traffic.

Our high-performance core routing family is engineered to provide a long-term solution for carrier networks addressing a wide range of network applications across a core IP network. Avici routers were designed to deliver new levels of scalability, reliability, and performance to IP networks using carrier-proven principles of redundancy, in-service upgrade ability, multi-generational investment protection, and quality assurance.

Avici has developed a modular network architecture that eliminates many of the constraints of traditional routers. Our core routing platforms support current and future traffic requirements by scaling, in-service, from gigabits to terabits of capacity through the non-disruptive addition of line cards and chassis. Unlike traditional routers, every port can be used to support customer traffic; no ports or external switching hubs are needed for interconnection or scaling. Our routing platforms provide carriers with the ability to transform complex and costly multi-tiered networks into a simplified and more stable, scalable, and reliable foundation to support traffic growth and lower cost requirements. Our routers can also perform both the core and aggregation/hub functions in a single platform, thereby eliminating the need for a separate aggregation layer. Our routing technologies provide internal hardware and software redundancy to deliver carrier-grade 99.999+% system availability to support SLAs on services such as VPNs and Voice over IP (VoIP). Because Avici products can deliver high levels of reliability, carriers are able to remove duplicate routers and simplify their PoPs. Avici routers also enable the IP network to recover quickly from service disruptions, a requirement for supporting real time services.

Our products provide these benefits through our proprietary technologies, including our application specific integrated circuits, or ASICs, Velociti^™ switch fabric and distributed system design, IPriori^™ system software, Composite Links^™, Non Stop Routing (NSR^™), and Reliable Alternate Paths for Internet Destinations (RAPID^™) technologies. We incorporate all of these proprietary technologies into each of our three available product form factors – the Terabit Switch Router (TSR), Stackable Switch Router (SSR), and Quarter-rack Scalable Router (QSR). The TSR, SSR, and QSR offer customers different combinations of speed capacities and numbers of available ports in order to allow them to tailor their network infrastructure to meet their traffic needs. We believe our core routing products establish a new model for carriers to build reliable and cost effective IP networks.

We have consolidated all data-flow and control processes, including packet input and output framing, forwarding, scheduling, and switching into our application specific integrated circuits, or ASICs. We utilize a distributed routing architecture. Each line card has its own ASICs, and, accordingly, the addition of each line card increases the overall capacity of our product. Our ASIC design and distributed switch fabric provide high levels of performance by enabling line rate packet forwarding performance regardless of packet address and route table size. We also work with leading component manufacturers in the areas of field programmable gate arrays (FPGAs), network processors, and framers. We have established a strategic relationship with Intel for the supply of network processors for use in our Multiservice Connect (MSC) family of line cards, which provide any service, any port (ASAP^™) flexibility to configure through software a range of services, such as ATM and packet over sonnet (POS), and interface speeds, thereby enabling carriers to support current and future service types over a cost effective platform.

Our Velociti switch fabric is the mechanism that transfers data from an input line card to specific output cards in our products. This direct communication provides high-speed data transfer and, as additional capacity is needed, enables cost-effective addition of line cards. Because all data handling, switching, and packet processing has been incorporated into the line cards, carriers are able to support higher speed line cards without forklift upgrades. The Velociti switch fabric also gives our products a high level of reliability by creating multiple connections between pairs of input and output line cards. In the event one path fails, one of the backup paths is selected to continue data transmission, thereby substantially reducing the risk of disruption to the network.

Avici’s IPriori system software has been developed to optimize and control switching and routing in all of our products. IPriori is built on a distributed model, which uses multiple processor units to provide increased levels of reliability and scalability, and is specifically designed to address the system requirements arising from scaling to a large number of ports. Through our network deployments and extensive field-testing, we have successfully demonstrated the interoperability of our products with standard protocols such as BGP, OSPF, IS-IS, and MPLS. Each software release is exhaustively tested under extreme traffic loads and multi-protocol stresses for optimal stability, interoperability, and performance in operational carrier networks.

Composite Links for Seamless Capacity Additions and Cost-Effective Link Protection

Avici’s proprietary Composite Links technology enables carriers to seamlessly expand capacity in the PoP by enabling multiple physical links or fiber interfaces between two Avici routers to be grouped into a single logical connection. This technology provides greater flexibility to carriers in migrating to higher-speed backbones that leverage multiple generations of fiber infrastructure and speeds. The interfaces used in Composite Links can support up to a 4:1 speed ratio. For example, this would allow OC-48c members to be combined with OC-192c members. A virtual 40-gigabit or higher connection can be supported today by combining lower speed interfaces into a single logical connection. Hardware upgrades can be done without costly downtime by adding or removing router modules without disruption to packet ordering, routing tables or traffic flows. Composite Links also provide carriers with cost-effective link protection through the ability to recover from failures on individual member-link interfaces. If a physical-layer failure occurs in the network that affects one or more of the member-link interfaces, all traffic is redistributed to the remaining member-links in less than 45 milliseconds—minimizing traffic loss and avoiding disruption at the IP layer.

Our products have been designed and manufactured to be highly reliable in the core of carrier networks. Avici’s NSR technology provides nodal reliability by protecting against failure of the route controller (brain of the router), enabling carriers to achieve 99.999+% system availability in a single router. This functionality is

achieved by having a second route controller that takes over routing functions in the event the primary fails. In the event of a failure of the primary route controller, NSR technology will enable the primary controller to switch over to an active backup route controller without disrupting the routing protocol interactions with other routers, without resetting line cards, and without disrupting service. NSR also provides carriers the ability to perform an in-service upgrade to a newer version of IPriori software without taking the router down and without disrupting service to customers. Many of today’s IP networks also use two core routers within a PoP to increase reliability. Avici NSR can provide potential cost savings by enabling carriers to end the costly practice of duplicating routers to increase router reliability.

Traditional IP networks have relied on the ability of routers to route around failed links when there is a failure. However, taking multiple seconds to recover when a link fails is not acceptable since data and service connections can be lost during that period. In order to support a multi-service network, routers need to quickly route traffic around network disruptions. Avici’s RAPID technology significantly improves recovery times, providing carriers the ability to achieve higher levels of network reliability.

Avici’s RAPID technology uses advanced software and routing algorithms to dramatically improve the recovery speed after a network disruption by pre-configuring alternate routing paths in the network. RAPID provides link protection internal to the system and does not require the complex manual configuration of setting up alternate paths associated with other protection methods.

All Avici routers provide support for other protection mechanisms such as MPLS Fast Reroute, APS, and 802.3ad link aggregation.

Our goal is to design, develop, and deliver carrier–class core routing solutions that provide the foundation for IP networks as they mature and enter a new phase of growth. Avici routers can help carriers redefine the economics of IP networks, delivering the reliability to support new real-time services, the in-service scalability to adapt to new traffic requirements and extend the longevity of the network, and the ability to converge networks to simplify the PoP and lower capital and operational costs. The key elements of our strategy are to:

Extend Technological Capabilities. We have developed a family of core routing solutions designed to address a wide range of applications in carrier networks. Our products provide multi-generational investment protection enabling carriers to support new products in existing chassis. We plan to continue to invest in research and development to meet the evolving requirements of carrier networks. In addition, we plan to enhance the features on our products to address new market developments.

Leverage Leading Distribution Channels. We augment our direct sales efforts with distribution channels to penetrate new geographies and carrier accounts. We have established a strategic relationship with Nortel Networks to market, sell, and support our products to carriers worldwide. We have also established a strategic relationship with Huawei Technologies for sale and support of our products in Greater China. In addition, we have developed other channel relationships with local reseller partners in a number of geographic regions to expand our global presence.

Continue Penetration of Key Carrier Accounts. We strive to capture the market opportunity presented by carriers demanding additional capacity as well as carriers seeking to cost effectively support new and existing services. We initially focused on a select group of leading carriers with the TSR. With the introduction of the SSR in October 2001 and the QSR in November 2002, we have expanded our total addressable market to include smaller service providers, metropolitan area network cores, and international carriers. Avici TSR, SSR, and QSR routers can support a wide range of core applications from the smallest to the largest PoPs in world.

Enable New Carrier Service Offerings. We work closely with our customers, prospective customers, and distribution channel partners to understand carriers’ network requirements. We use this knowledge to develop new features and functionalities to enable carriers to better support their customers. We will seek additional opportunities to enhance our product features and promote our products as an effective means for carriers to capitalize on new service opportunities.

Rely on Strategic Outsourcing. Our manufacturing outsourcing strategy enables us to focus our resources on our core competencies of product design and development. Although we design and develop our ASICs and other proprietary technologies, we select and work closely with ASIC fabrication and electronics manufacturing providers to promote the cost-effective, timely and reliable manufacture and testing of our products. We have also established a relationship with an off-shore project developer for selected software development projects.

We sell and market our products through our direct sales force, sales agents, systems integrators, and third party distributors, including Nortel Networks and Huawei Technologies.

In January 2004, we entered into a strategic relationship with Nortel Networks. Under the terms of this agreement, Nortel Networks will market, sell, and support our products on a nonexclusive worldwide basis. The initial term of the agreement is three years and it automatically renews for additional one-year terms. There is no minimum purchase commitment associated with the agreement. In addition, technology from both companies will be incorporated as part of Nortel Networks’ converged network solutions based upon IP technology. These converged network solutions will target VoIP, wireless/wireline convergence, and carrier data applications supplying carriers a transition to a converged network.

In the second quarter of 2003, we entered into a strategic relationship with Huawei Technologies. The agreement describes the terms and conditions under which Huawei Technologies may acquire products from us for sale, distribution, and support in Greater China. The initial term of the agreement is two years and may be renewed for additional one-year periods. The agreement has no minimum purchase commitment associated with it.

Our international sales are conducted through a direct sales force, systems integrators, distributors, and sales agents. In addition to Nortel Networks and Huawei Technologies, we have regional partners in Europe, Japan, Asia, and Latin America.

Our sales cycle to carriers typically is a lengthy and deliberate process. After preliminary discussions, prospective customers may receive evaluation equipment to encourage formal testing. The sales cycle normally includes laboratory testing in which our products are evaluated against competing products for performance, scalability, reliability, interoperability, and other measures. Upon completion of the laboratory tests, one product is typically selected for field trials in which the product is deployed in a carrier’s network in a limited and controlled fashion. Only after successful completion of field trials will carriers place orders for commercial deployment across their networks over time.

We believe that a broad range of support services is critical to the successful installation and ongoing support of our products, the development of long-term relationships with customers and the generation of additional sales of our products to our customers. We are committed to providing our customers with the highest levels of service and support either directly or through the service organizations of our distribution partners.

Our target end-user customers include incumbent local exchange carriers, inter-exchange carriers, postal telephone and telegraph operators or PTTs (international incumbent operators), international competitive carriers, Internet service providers, and agencies of the United States government.

During 2000, we entered into customer agreements with AT&T Corp., Qwest Communications, WilTel Communications Group, formerly known as Williams Communications, and Enron Broadband Services. These agreements provide the terms and conditions under which these customers may purchase equipment from us. At December 31, 2004, the status of these agreements were as follows:

Our agreement with AT&T, amended in September 2004, has no minimum purchase commitment level and remains in effect until December 31, 2009. The agreement describes the condition under which AT&T may purchase equipment and services from us. AT&T has deployed our TSR product in fourteen locations within its North American IP backbone network and we expect continued deployments in additional locations.

Our agreement with Qwest provided for a minimum purchase commitment, which was met in 2002. The agreement continued until July 2003 and, by its terms, was automatically renewed for an additional one-year term. We do not expect additional purchases under this agreement.

In December 2001, Avici amended its agreement with WilTel and extended its term through December 2003. The amended agreement provided for a cash payment of $8.5 million, which we received in December 2001 in lieu of remaining purchase commitments in the original agreement totaling $25 million. The $8.5 million payment represented $2.7 million for product deliveries made in the fourth quarter of 2001, and $5.8 million available as a credit applicable at various rates against future purchases through 2003. Approximately $2.8 million of the $5.8 million was used by WilTel to acquire equipment in 2003 and the remaining $3 million was unused and expired as an available credit at December 31, 2003. The unused credit was included in other income in our results of operations for the year ended December 31, 2003.

Our agreement with Enron had a purchase commitment of $15 million. In December 2001, Enron Broadband Services filed for United States bankruptcy protection. We do not expect to generate additional product revenue from Enron.

In April 2003, we entered into a strategic relationship with Huawei. The agreement describes the terms and conditions under which Huawei may acquire equipment from us for sales and distribution in Greater China. The agreement has no minimum purchase commitment associated with it.

In January 2004, we entered into a worldwide three-year strategic agreement with Nortel. Under this agreement, Nortel will market, sell and support Avici’s carrier-class core routers as part of its converged network solutions based on Internet Protocol (IP) technology. The agreement has no minimum purchase commitment associated with it.

Avici’s products are currently in various stages of trials and tests with prospective customers, both internationally and domestically. Deployment of our products is dependent upon the successful completion of such trials. There can be no assurance as to the timing of the completion of these trials and tests or that their outcome will be favorable.

During the year ended December 31, 2002, AT&T and Qwest each accounted for greater than 10% of our gross revenue. During the year ended December 31, 2003, AT&T accounted for greater than 10% of our gross revenue. During the year ended December 31, 2004, AT&T, Nortel and Huawei each accounted for greater than 10% of our gross revenue.

We believe we have a team of skilled engineers responsible for product design and development, quality assurance, and documentation. Our engineers have significant experience in optical networking, hardware and software, with particular strengths in the areas of high speed interconnect, scalable connection fabrics, ASIC development and Internet routing protocols. We believe that strong product development capabilities are essential to our strategy of enhancing our core technology and developing additional applications in an effort to

maintain the competitiveness of our product offerings. We have made, and will continue to make, a substantial investment in research and development. Research and development expenses were $32.4 million, $46.5 million, and $55.8 million for the years ended December 31, 2004, 2003, and 2002, respectively.

The market for intelligent data networking equipment is intensely competitive, subject to rapid technological change and significantly affected by new product introductions and other market activities of industry participants. This market historically has been dominated by Cisco Systems, which as a result of its early leadership position in the market has been able to develop and promote a broad product line of routers. We also compete with other established companies such as Juniper Networks. We may experience reluctance by our prospective customers to replace or expand their current infrastructure solutions, which may be supplied by these competitors, with our products. In addition, these competitors have significantly broader product lines than we do and may bundle their products with other networking products that we do not offer. In order to compete effectively, we must deliver a technologically advanced product that is superior in meeting the needs of carriers, namely a product which:

In addition, we must leverage our distribution partners to extend market acceptance of our products with carriers.

Many of our current and potential competitors have greater selling and marketing, technical, manufacturing, financial and other resources, more customers, greater market recognition, and more established relationships and alliances in the industry. As a result, these competitors may be able to develop, enhance and expand their product offerings more quickly, adapt more swiftly to new or emerging technologies and changes in customer demands, devote greater resources to the marketing and sale of their offerings, pursue acquisitions and other opportunities more readily, and adopt more aggressive pricing policies than us.

We presently have over ten patents granted in the United States and over 40 United States and foreign patent applications pending. Our success and ability to compete are dependent on our ability to develop and maintain the proprietary aspects of our technology and operate without infringing on the proprietary rights of others. We rely on a combination of patent protection, copyrights, trademarks, trade secret laws, contractual restrictions on disclosure, and other methods to protect the proprietary aspects of our technology. These legal protections afford only limited protection for our technology. We cannot be certain that patents will be granted based on our pending or any other applications, or that, even if issued, the patents will adequately protect our technology. We seek to protect our source code for our software, documentation and other written materials under trade secret and copyright laws, and we seek to limit disclosure of our intellectual property by requiring employees, consultants, and any third-party with access to our proprietary information to execute confidentiality agreements with us.

While we rely on patent, copyright, trade secret and trademark law to protect our technology, we also believe that factors such as the technological and creative skills of our personnel, new product developments, frequent product enhancements, and reliable product maintenance are essential to establishing and maintaining a technology leadership position. We cannot assure you that others will not develop technologies that are similar or superior to our technology.

Our success will depend upon our ability to obtain necessary intellectual property rights and protect our intellectual property rights. We cannot be certain that we will be able to obtain the necessary intellectual property rights or that other parties will not contest our intellectual property rights.

We outsource the manufacture and assembly of our products to contract manufacturers. We primarily use Celestica Corporation and Sanmina-SCI Corporation, both of which provide comprehensive manufacturing services, including assembly, test and control and procurement of material, on our behalf. We design product tests that are conducted using our test equipment by the contract manufacturer. We believe that the outsourcing of our manufacturing enables us to conserve the working capital that would be required to purchase capital equipment, allows us to adjust manufacturing volumes to meet changes in demand and enables us to more quickly deliver products.

As of December 31, 2004, we had 195 employees. Our future success will depend in part on our ability to attract, retain and motivate highly qualified technical, sales and management personnel, for whom competition is intense. Our employees are not represented by any labor union. We believe our relations with our employees are good.

See section (m) of Note 1 to Consolidated Financial Statements at Item 8 incorporated herein by reference.

Our Internet address is www.avici.com. On our Investor Relations web site, located at www.avici.com, we post the following filings as soon as reasonably practicable after they are electronically filed with or furnished to the Securities and Exchange Commission: our annual report on Form 10-K, our quarterly reports on Form 10-Q, our current reports on Form 8-K, our proxy statement on Form 14A related to our annual stockholders’ meeting and any amendments to those reports or statements filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934. All such filings on our Investor Relations web site are available free of charge.

Our headquarters is currently located in a leased facility in North Billerica, Massachusetts, consisting of approximately 81,000 square feet under a lease expiring in October 2007. In the third quarter of 2002 we recorded a restructuring charge which included all the remaining lease payments associated with a 51,000 square foot facility located in the same office complex, which lease expired in July 2004. We also lease sales office space in several locations in the United States and Asia.

The commercial real estate market in the Boston area is unpredictable in terms of available space, rental and occupancy rates and preferred locations. However, we expect our current space will be adequate to support our targeted growth for the next twelve to eighteen months.

In addition to claims in the normal course of business, twelve purported securities class action lawsuits were filed against Avici and one or more of Avici’s underwriters in Avici’s initial public offering, and certain officers and directors of Avici. The lawsuits alleged violations of the federal securities laws and were docketed in the U.S. District Court for the Southern District of New York (the “Court”) as: Felzen, et al. v. Avici Systems Inc., et al., C.A. No. 01-CV-3363; Lefkowitz, et al. v. Avici Systems Inc., et al., C.A. No. 01-CV-3541; Lewis, et al. v. Avici Systems Inc., et al., C.A. No. 01-CV-3698; Mandel, et. al v. Avici Systems Inc., et al., C.A. No. 01-CV-3713;

Minai, et al. v. Avici Systems Inc., et al., C.A. No. 01-CV-3870; Steinberg, et al. v. Avici Systems Inc., et al., C.A. No. 01-CV-3983; Pelissier, et al. v. Avici Systems Inc., et al., C.A. No. 01-CV-4204; Esther, et al. v. Avici Systems Inc., et al., C.A. No. 01-CV-4352; Zhous, et al. v. Avici Systems Inc. et al., C.A. No. 01-CV-4494; Mammen, et al. v. Avici Systems Inc., et. al., C.A. No. 01-CV-5722; Lin, et al. v. Avici Systems Inc., et al., C.A. No. 01-CV-5674; and Shives, et al. v. Banc of America Securities, et al., C.A. No. 01-CV-4956. On April 19, 2002, a consolidated amended class action complaint (the “Complaint”), which superseded these twelve purported securities class action lawsuits, was filed in the Court. The Complaint is captioned “In re Avici Systems, Inc. Initial Public Offering Securities Litigation” (21 MC 92, 01 Civ. 3363 (SAS)) and names as defendants Avici, certain of the underwriters of Avici’s initial public offering, and certain of Avici’s officers and directors. The Complaint, which seeks unspecified damages, alleges violations of the federal securities laws, including among other things, that the underwriters of Avici’s initial public offering (“IPO”) improperly required their customers to pay the underwriters excessive commissions and to agree to buy additional shares of Avici’s stock in the aftermarket as conditions of receiving shares in Avici’s IPO. The Complaint further claims that these supposed practices of the underwriters should have been disclosed in Avici’s IPO prospectus and registration statement. In addition to the Complaint against Avici, various other plaintiffs have filed other substantially similar class action cases against approximately 300 other publicly traded companies and their IPO underwriters in New York City, which along with the case against Avici have all been transferred to a single federal district judge for purposes of case management. Avici and its officers and directors believe that the claims against Avici lack merit, and have defended the litigation vigorously. In that regard, on July 15, 2002, Avici, together with the other issuers named as defendants in these coordinated proceedings, filed a collective motion to dismiss the consolidated amended complaints against them on various legal grounds common to all or most of the issuer defendants.

On October 9, 2002, the Court dismissed without prejudice all claims against the individual current and former officers and directors who were named as defendants in our litigation, and they are no longer parties to the lawsuit. On February 19, 2003, the Court issued its ruling on the motions to dismiss filed by the issuer defendants and separate motions to dismiss filed by the underwriter defendants. In that ruling, the Court granted in part and denied in part those motions. As to the claims brought against Avici under the antifraud provisions of the securities laws, the Court dismissed all of these claims with prejudice, and refused to allow the plaintiffs an opportunity to re-plead these claims against Avici. As to the claims brought under the registration provisions of the securities laws, which do not require that intent to defraud be pleaded, the Court denied the motion to dismiss these claims as to Avici and as to substantially all of the other issuer defendants as well. The Court also denied the underwriter defendants’ motion to dismiss in all respects.

In June 2003, Avici elected to participate in a proposed settlement agreement with the plaintiffs in this litigation. If ultimately approved by the Court, this proposed settlement would result in the dismissal, with prejudice, of all claims in the litigation against Avici and against any of the other issuer defendants who elect to participate in the proposed settlement, together with the current or former officers and directors of participating issuers who were named as individual defendants. The proposed settlement does not provide for the resolution of any claims against the underwriter defendants, and the litigation as against those defendants is continuing. The proposed settlement provides that the class members in the class action cases brought against the participating issuer defendants will be guaranteed a recovery of $1 billion by insurers of the participating issuer defendants. If recoveries totaling $1 billion or more are obtained by the class members from the underwriter defendants, however, the monetary obligations to the class members under the proposed settlement will be satisfied. In addition, Avici and any other participating issuer defendants will be required to assign to the class members certain claims that they may have against the underwriters of their IPOs.

The proposed settlement contemplates that any amounts necessary to fund the settlement or settlement-related expenses would come from participating issuers’ directors and officers liability insurance policy proceeds as opposed to funds of the participating issuer defendants themselves. A participating issuer defendant could be required to contribute to the costs of the settlement if that issuer’s insurance coverage were insufficient to pay that issuer’s allocable share of the settlement costs. Avici expects that its insurance proceeds will be sufficient for these purposes and that it will not otherwise be required to contribute to the proposed settlement.

Consummation of the proposed settlement is conditioned upon obtaining both preliminary and final approval by the Court. Formal settlement documents were submitted to the Court in June 2004, together with a motion asking the Court to preliminarily approve the form of settlement. Certain underwriters who were named as defendants in the settling cases, and who are not parties to the proposed settlement, opposed preliminary approval of the proposed settlement of those cases. On February 15, 2005, the Court issued an order preliminarily approving the proposed settlement in all respects but one. The plaintiffs and the issuer defendants are in the process of assessing whether to proceed with the proposed settlement, as modified by the Court. If the plaintiffs and the issuer defendants elect to proceed with the proposed settlement, as modified by the Court, they will submit revised settlement documents to the Court. The underwriter defendants may then have an opportunity to object to the revised settlement documents. If the Court approves the revised settlement documents, it will direct that notice of the terms of the proposed settlement be published in a newspaper and mailed to all proposed class members and schedule a fairness hearing, at which objections to the proposed settlement will be heard. Thereafter, the Court will determine whether to grant final approval to the proposed settlement.

If the proposed settlement described above is not consummated, Avici intends to continue to defend the litigation vigorously. Moreover, if the proposed settlement is not consummated, Avici believes that the underwriters may have an obligation to indemnify Avici for the legal fees and other costs of defending this suit and that Avici’s directors’ and officers’ liability insurance policies would also cover the defense and potential exposure in the suit. While Avici can make no promises or guarantees as to the outcome of these proceedings, Avici believes that the final result of these actions will have no material effect on Avici’s consolidated financial condition, results of operations or cash flows.

The Securities and Exchange Commission (the “SEC”) is conducting several investigations relating to Qwest Communications International (“Qwest”) and its business relationships. In the SEC investigation entitled “Issuers Related to Qwest,” Avici understands that it is one of eleven companies whose business dealings with Qwest are being investigated. Avici has cooperated with these investigations and there has been no wrong-doing by Avici alleged in any of these investigations. How long these investigations may continue and their ultimate outcome cannot be determined.

During the quarter ended December 31, 2004, no matters were submitted to a vote of security holders through the solicitation of proxies or otherwise.

Our common stock has been traded on the NASDAQ National Market under the symbol “AVCI” since July 28, 2000. The following table sets forth, for the periods indicated, the high and low sale prices as reported on the NASDAQ National Market.

We have never paid or declared any cash dividends on our common stock or other securities and do not anticipate paying cash dividends in the foreseeable future. Any future determination to pay cash dividends will be at the discretion of the Board of Directors and will be dependent upon our financial condition, results of operations, capital requirements, general business condition and such other factors as the Board of Directors may deem relevant.

Information concerning our equity compensation plans is set forth in our Definitive Proxy Statement with respect to our 2004 Annual Meeting of Stockholders to be filed with the Securities and Exchange Commission not later than 120 days after the end of the fiscal year, under the heading of “Equity Compensation Plan Information,” which is incorporated herein by reference.

The following table sets forth information with respect to our acquisition of shares of our common stock during the fourth quarter of 2004:

The following selected consolidated financial data should be read in conjunction with the consolidated financial statements and notes thereto and with “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and other financial data included elsewhere in this report. The statement of operations data for the years ended December 31, 2004, 2003 and 2002, and the balance sheet data as of December 31, 2004 and 2003 are derived from our audited consolidated financial statements, which are included elsewhere in this report. The statement of operations data for the years ended December 31, 2001 and 2000 and the consolidated balance sheet data as of December 31, 2001, and 2000 are derived from our audited consolidated financial statements which are not included in this report. The historical results are not necessarily indicative of results to be expected for any future period.

Prior to Avici’s initial public offering which was consummated on August 2, 2000, weighted average common shares used in computing basic and diluted net loss per share exclude unvested shares of common stock subject to repurchase rights, as well as shares issuable upon conversion of redeemable convertible preferred stock. Weighted average common shares used in computing pro forma basic and diluted net loss per share includes the weighted average effect of the foregoing unvested restricted shares of common stock as well as shares issuable upon conversion of redeemable convertible preferred stock from the respective dates of issuance. Basic and diluted net loss per share are the same because all outstanding common stock options have been excluded, as they are considered antidilutive (see footnote 1(j) of the Notes to the Consolidated Financial Statements).

The following discussion and analysis should be read in conjunction with “Selected Consolidated Financial Data” and the accompanying consolidated financial statements and related notes included elsewhere in this Form 10-K. This report contains forward-looking statements which involve risks and uncertainties. We make such forward-looking statements under the provision of the “Safe Harbor” section of the Private Securities Litigation Reform Act of 1995. Any forward-looking statements should be considered in light of the factors described below in this Item 7 under “Factors That May Affect Future Results.” Actual results may vary materially from those projected, anticipated or indicated in any forward-looking statements. In this report, the words “anticipates,” “believes,” “expects,” “intends,” “future,” “could,” “will,” and similar words or expressions (as well as other words or expressions referencing future events, conditions or circumstances) identify forward-looking statements.

Avici Systems provides high-speed data networking equipment that enables telecommunications companies and Internet service providers to transmit high volumes of information across their networks.

Since our inception, we have incurred significant losses. As of December 31, 2004, we had an accumulated deficit of $401.0 million. Our operating activities from inception through 1999 were primarily devoted to research and development, including the design and development of our proprietary application specific integrated circuits, or ASICs, and software, and system testing the Avici Terabit Switch Router (TSR^®). Revenue was first recognized during the first quarter of 2000. Since then we have also built our administrative, marketing, sales, customer support and manufacturing organizations and developed strategic relationships with systems integrators, distributors, customers and complementary vendors. We have not achieved profitability on a quarterly or an annual basis and anticipate that we will continue to incur operating losses in the foreseeable future. We have a lengthy sales cycle for our products and, accordingly, we expect to incur significant selling and other expenses before we realize the related revenue. During 2001 and 2002 we took actions to realign our cost structure in reaction to industry conditions resulting in a significant decrease in capital spending by telecommunications service providers. We expect that sales and marketing, research and development, and general and administrative expenses will increase as our business expands. As a result, we will need to generate significant revenues to achieve and maintain profitability.

During the fourth quarter of 1999 we introduced the TSR which is purpose-built for the stresses of carrier core routing in large IP networks. The first TSR sale occurred during the first quarter of 2000. During 2001 we introduced the Avici Stackable Switch Router (SSR^™), a rack-mountable scalable router for carriers and service providers with smaller core networks. The first SSR sale occurred during the fourth quarter of 2001. During the fourth quarter of 2002, we introduced the Avici Quarter-rack Scalable Router (QSR^™), which provides customers with one of the smallest footprint, highest density routers commercially available. The first QSR sale occurred during the fourth quarter of 2003. We currently market our products to major carriers in North America through our direct sales force and third party distribution partners. We also market our products internationally through sales agents, systems integrators and distributors, and through a direct sales force in Europe and Asia. We currently provide product installation and customer field support through our internal customer service organization and third-party support organizations. During 2003 we entered into a strategic relationship with Huawei Technologies (Huawei) for sale of our products in Greater China and distribution arrangements with several resellers. In January 2004 we entered into a worldwide strategic relationship with Nortel Networks (Nortel) to market, sell and support our products.

Our target end-user customers include incumbent local exchange carriers, inter-exchange carriers, postal telephone and telegraph operators (PTTs) (international incumbent operators), international competitive carriers, Internet service providers, and agencies of the United States government. Our products have been deployed at AT&T Corp. (AT&T), Qwest Communications (Qwest), several agencies of the United States government, and in laboratory environments including the France Telecom R&D VTHD research network and Chung Hwa Telecom, among others and in Greater China through our distribution partner, Huawei. Our products are currently in trials and tests with additional prospective customers, both internationally and domestically. There can be no assurance as to the timing of the completion of these trials and tests or that their outcome will be favorable.

We expect that in the foreseeable future, substantially all of our revenue will continue to depend on sales of our TSR, SSR, and QSR to current customers and a limited number of potential new customers. We also expect to generate revenue through our distribution and OEM partnering arrangements. Generally, these customers and partners are not contractually committed to purchase any minimum quantities of products from us.

In September 2004 we amended our original procurement agreement with AT&T to extend through December 31, 2009. The agreement describes the conditions under which AT&T may purchase equipment and services from us. AT&T has the ability, but not the obligation to purchase equipment and services from us. The agreement has no minimum purchase commitment associated with it.

In January 2004, in connection with a three-year strategic OEM agreement with Nortel Networks, Avici issued a warrant to purchase 800,000 shares of Avici common stock at an exercise price of $8.03 per share. The agreement provides Nortel Networks with the ability, but not the obligation, to purchase equipment and services from Avici for its own use or for resale. The warrant is nonforfeitable and has a term of approximately seven years from the date of issuance and is exercisable after seven years. The right to exercise the warrant may be

accelerated if Nortel Networks achieves certain performance milestones. The fair value of the warrant was calculated to be approximately $6.3 million using the Black-Scholes valuation model, and is recorded as a reduction of revenue on a systematic basis, currently straight-line, over the economic life of the agreement, which is expected to be three years. The unamortized balance of $4.2 million at December 31, 2004 is recorded as a Contract Distribution Right in the accompanying balance sheet.

In December 2000, in connection with the execution of a nonexclusive systems and services agreement with AT&T, Avici issued a warrant to purchase 212,500 shares of Avici’s common stock at a per-share exercise price of $110.92. The agreement provides AT&T with the ability, but not the obligation, to purchase equipment and services from Avici. The warrant is nonforfeitable, fully exercisable and has a term of five years from the date of issuance. The fair value of the warrant was calculated to be $9.8 million using the Black-Scholes valuation model, and was deferred as a reduction to equity and was fully amortized as an offset to gross revenue on a straight-line basis over the three-year initial term of the agreement.

Cost of Revenue - Product includes material cost, provision for warranty, rework, depreciation and provision for excess and obsolete inventory. We outsource our manufacturing operations to contract manufacturers that assemble and test our products in accordance with our specifications. Accordingly, a significant portion of our product cost is material cost paid to these entities. Avici’s cost of revenue also includes overhead costs, primarily for material procurement associated with our manufacturing. Warranty costs and inventory provisions are expensed as cost of revenue-product.

Cost of Revenue – Service includes costs associated with providing customer support and maintenance services.

Research and development expenses consist primarily of salaries and related employee costs, depreciation expense on laboratory equipment and project costs, namely, prototype equipment, materials costs and third-party costs and fees related to the development and prototyping of our proprietary technology. Project costs may vary from period to period depending upon the timing and extent of applicable initiatives. Depreciation expenses have decreased in 2004, as current capital expenditures are lower than prior years’ additions, which have become fully depreciated. In the future, research and development expenses may increase as additional resources become necessary to further support our channel partners and to remain competitive as demand for new products, product features and functionality increases.

Sales and marketing expenses consist primarily of salaries and related employee costs, sales commissions, travel, public relations, training and other costs associated with marketing material and tradeshows. In the future, we expect sales and marketing expenses may increase as demand for our products increases and we broaden our sales infrastructure, establish sales offices in new locations domestically and internationally, initiate new marketing programs and invest to further support our channel partners.

General and administrative expenses consist primarily of salaries and related costs for executive, finance, legal, facilities, human resources and information technology personnel as well as professional and compliance related fees. In the future, we expect that general and administrative expenses may increase as we add personnel and incur additional costs related to the growth of our business and increased regulatory compliance requirements.

Through December 31, 2001, Avici had recorded cumulative non-cash deferred compensation, relating to pre-IPO stock option grants, as an element of stockholders’ equity, representing the aggregate difference between the deemed fair value of Avici’s common stock and the exercise price of stock options and restricted stock granted and the selling price of stock sold. The deferred compensation has been recognized as an expense over the vesting period of the stock options and restricted stock and has been fully expensed by the third quarter of 2004. During the years ended December 31, 2004, 2003 and 2002, Avici recorded approximately $0.3 million, $1.0 million and $4.1 million, respectively, of non-cash compensation expense associated with these grants.

In January 2004, Avici granted 30,000 shares of restricted stock to certain key employees of the Company. The shares vest on a quarterly basis over four quarters. The value of the shares at the date of grant was $0.4 million and was charged to sales and marketing, general and administrative and research and development expenses on a straight-line basis over the vesting period and have been fully expensed by the fourth quarter of 2004.

In June 2004, Avici granted 120,000 shares of restricted stock to certain key employees of the Company. The shares vest five years from the grant date. Vesting may be accelerated upon the achievement of certain pre-defined performance milestones. The value of the shares at the date of grant was $1.3 million and is being charged to sales and marketing, general and administrative and research and development expenses on a straight-line basis over the five year vesting period. If the performance milestones are achieved and vesting is accelerated, the remaining unamortized value of the shares will be charged to expenses in the period in which performance is achieved. During the year ended December 31, 2004 Avici recorded approximately $0.1 million of compensation expense associated with these grants. Avici expects to recognize compensation expense of approximately $0.2 million in 2005 and $0.6 million thereafter, related to such grants, after adjusting for employment terminations.

Avici implemented restructuring programs in 2001 and 2002 and recorded cumulative net charges of $2.0 million. In 2004, we paid $0.4 million in lease payments associated with those charges. As of December 31, 2004, all liabilities associated with these programs have been liquidated.

Additionally, in 2001, Avici recorded a charge of $17.2 million as an element of product cost of revenue to reflect a write down of inventories and inventory commitments for long lead-time items that were considered to be in excess of the then foreseeable demand. Since that time a substantial portion of the related inventories were discarded or utilized. The utilization has been recorded and disclosed primarily as a reduction of cost of revenue in the period utilized. Amounts recorded as a reduction of cost of revenue were $0.8 million, $1.9 million and $2.5 million in 2004, 2003 and 2002, respectively. Avici does not expect significant utilization of such inventory in the future.

We expect telecommunications service providers to continue to maintain conservative levels of capital spending in the near term. However, any decline in spending for certain telecommunications equipment, or any change in our business strategy could necessitate further restructuring and such restructuring could have an adverse impact on the results of operations and financial condition of Avici.

Avici considers the following accounting policies related to revenue recognition, cost of revenue – service, inventory valuation, warranty liabilities, and long-lived assets to be critical accounting policies due to the estimation processes and judgments involved in each. Avici bases its estimates on historical experience and various other factors that are believed to be reasonable under the circumstances. Actual results may differ from these estimates under different assumptions or conditions.

Avici recognizes revenue from product sales upon shipment to customers, including resellers, provided that a purchase order has been received or a contract has been executed, there are no uncertainties regarding customer acceptance, the sales price is fixed or determinable and collectibility is deemed probable. If uncertainties regarding customer acceptance exist, Avici recognizes revenue when those uncertainties are resolved. For arrangements that include the delivery of multiple elements, revenue is allocated to the various elements based on vendor-specific objective evidence of fair value (VSOE). Avici uses the residual method when VSOE does not exist for one of the delivered elements in an arrangement. We also generate revenue from support and maintenance as well as installation and service. We defer revenue from support and maintenance contracts and recognize it ratably over the period of the related agreements. We recognize revenue from installation and other services as the work is performed. Amounts collected or billed prior to satisfying the above revenue recognition criteria are recorded as deferred revenue. In the event the Company is unable to meet one or all of the above criteria on a timely basis, revenue recognized for any reporting period could be adversely affected.

Cost of Revenue – Service includes internal costs associated with providing customer support and maintenance services. As personnel responsible for providing such services are also engaged in other activities such as sales and marketing and product development, Avici aggregates certain costs, including payroll, fringe, overhead and depreciation, and allocates a portion of those costs to Cost of Revenue – Service. Such allocation is based on an estimation of time devoted towards supporting the service programs, which Avici believes to be reasonable.

We value our inventory at the lower of the actual cost to purchase or the current estimated market value. We regularly review inventory quantities on hand and inventory commitments with suppliers and record a provision for potentially excess and obsolete inventory based primarily on our estimated forecast of product demand for up to the next twelve months. Demand for our products can fluctuate suddenly and significantly due to changes in economic and business conditions. A significant increase in demand for our products could result in a short-term increase in the cost of inventory purchases while a significant decrease in demand could result in an increase in the amount of excess inventory on hand and at suppliers. In addition, our industry is characterized by rapid technological change, frequent new product development, and rapid product obsolescence that could result in an increase in the amount of obsolete inventory on hand and at suppliers. Therefore, although we make every effort to ensure the accuracy of our forecasts of future product demand, any significant unanticipated changes in demand or technological developments could have a significant impact on the value of our inventory and our reported operating results.

Our warranties require us to repair or replace defective products returned to us during the warranty period at no cost to the customer. We record an estimate for warranty related costs at the time of sale based on our actual historical return rates and repair costs. While our warranty costs have historically been within our expectations and the provisions established, we cannot guarantee we will continue to experience the same warranty return rates or repair costs that we have in the past. A significant increase in product return rates, or a significant increase in the costs to repair our products, could have a material adverse impact on future operating results for the period or periods in which such returns or additional costs materialize and thereafter.

We review property, plant, and equipment for impairment whenever events or changes in circumstances indicate that the carrying amount of such an asset may not be recoverable. Recoverability of these assets is measured by comparison of their carrying amount to future undiscounted cash flows the assets are expected to

generate over the remaining economic life. If such assets are considered to be impaired, the impairment to be recognized in earnings equals the amount by which the carrying value of the assets exceeds their fair market value determined by either a quoted market price, if any, or a value determined by utilizing a discounted cash flow technique. Although we have recognized no material impairment adjustments related to our property, plant, and equipment, except those made in conjunction with restructuring actions, deterioration in our business in the future could lead to such impairment adjustments in future periods. Evaluation of impairment of long-lived assets requires estimates of future operating results that are used in the preparation of the expected future undiscounted cash flows. Actual future operating results and the remaining economic lives of our long-lived assets could differ from the estimates used in assessing the recoverability of these assets. These differences could result in impairment charges, which could have a material adverse impact on our results of operations.

Fiscal Year ended December 31, 2004 Compared to Fiscal Year Ended December 31, 2003

Total gross revenue decreased $12.8 million to $26.6 million in 2004 from $39.4 million in 2003. Gross product revenue decreased $13.9 million to $21.2 million in 2004 from $35.1 million in 2003. The decrease in gross product revenue is primarily due to a decrease in our product volume due to delays in network build outs and resultant decline in customer orders. Net product revenue, after warrant amortization of $2.1 million and $2.5 million in 2004 and 2003 respectively, decreased $13.7 million to $19.0 million in 2004 from $32.7 million in 2003. Service revenue increased $1.2 million to $5.5 million in 2004 from $4.3 million in 2003. The increase in service revenue relates to a period over period increase in our installed base of products. Three customers accounted for 99% of the gross revenue in 2004. One customer accounted for 82% of gross revenue in 2003.

Total cost of revenue decreased $2.6 million to $12.1 million in 2004 from $14.7 million in 2003. Product cost of revenue was 52% and 36% of product net revenue in 2004 and 2003, respectively. Product cost of revenue is net of credits for the utilization of inventory previously reserved in 2001 resulting from a downturn in industry demand. Such credits were $0.8 million and $1.9 million in 2004 and 2003, respectively. The higher product cost of revenue as a percentage of product net revenue in 2004 as compared 2003 was a result of fixed costs on lower volume, a higher proportion of sales through channel partners in 2004 at discounts higher than in direct sales, and to a lesser extent a higher utilization of previously reserved inventory in 2003.

Product cost of revenue as a percentage of product net revenue is affected by changes in the mix of products sold, discounts and related pricing, channels of distribution, changes in material costs, excess inventory and obsolescence charges, changes in volume and pricing competition. In the longer term due to an expected increase in sales through distribution channels, which will typically result in lower margin than in direct sales, we expect that product cost of revenue as a percentage of product net revenue will be higher than historical levels.

Service cost of revenue was 42% and 71% of service revenue in 2004 and 2003, respectively. The lower percentage in the 2004 periods is primarily the result of economies gained from an increase in service revenues due to a growing installed base coupled with lower depreciation costs on service related capital equipment.

Research and development expenses decreased $14.1 million to $32.4 million in 2004 from $46.5 million in 2003. The decrease in the 2004 periods from the comparable periods in 2003 was primarily due to a reduction in depreciation expenses of approximately $10.4 million, as current capital expenditures are lower than prior years’ additions, which have become fully depreciated. Also contributing to the decline is a reduction in payroll related expenses of $2.9 million, primarily due a reduction in employee incentive costs since performance targets in 2004 were not achieved. A reduction of project related costs of $1.0 million also contributed to the decrease in 2004.

Sales and marketing expenses remained reasonably flat and decreased $0.1 million to $10.8 million in 2004 from $10.9 million in 2003.

General and administrative expenses decreased $0.4 million to $5.7 million in 2004 from $6.1 million in 2003. The decrease in the 2004 periods was primarily due to a reduction in depreciation expense.

Stock-based compensation, primarily associated with pre-IPO grants, decreased $0.7 million to $0.3 million in 2004 from $1.0 million in 2003. The decrease in 2004 is primarily the result of certain option grants becoming fully vested and the related compensation becoming fully amortized, as well as the forfeiture of stock options associated with employee terminations.

Interest income decreased $0.8 million to $1.4 million in 2004 from $2.2 million in 2003. The decrease in 2004 is due to the decrease in invested cash balances resulting from the use of cash to fund operations in 2004 partially offset by higher investment yields.

Interest expense was eliminated in 2004 as compared to $0.1 million in 2003 due to the expiration of equipment-based capital leases.

There was no other income in 2004 compared to $3.0 million in 2003. Other income in 2003 relates to the expiration of certain customer credits that were previously recorded in deferred revenue.

We have not recorded a provision for income taxes because we have experienced net losses from our inception. As of December 31, 2004, we had net operating loss and tax credit carryforwards of approximately $334.2 million and $10.0 million, respectively. Approximately $18.4 million of Avici’s net operating loss carryforwards relate to deductions associated with Avici’s stock option plans, which will be benefited through stockholders’ equity if realized. The federal net operating loss carryforwards expire beginning in 2012 through 2024, and are subject to review and possible adjustment by the Internal Revenue Service (IRS). The utilization of the net operating loss carryforwards may be subject to annual limitations as a result of changes in the ownership of the Company. We did not record any tax benefits relating to these losses due to the uncertainty surrounding the realization of our deferred tax assets.

Fiscal Year ended December 31, 2003 Compared to Fiscal Year Ended December 31, 2002

Gross revenue increased $6.3 million to $39.4 million in 2003 from $33.1 million in 2002. Gross revenue increased in 2003 primarily due to an increase in our product volume from our customers. Net revenue, after warrant amortization of $2.5 million and $3.3 million in 2003 and 2002 respectively, increased $7.1 million to $37.0 million in 2003 from $29.9 million in 2002. Service revenue increased $0.5 million to $4.3 million in 2003

from $3.8 million in 2002. Service revenue increased in 2003 primarily due to a larger installed base. One customer accounted for 81% of net revenue in 2003. Two customers accounted for 53% and 42% of net revenue in 2002.

Total cost of revenue decreased $2.7 million to $14.7 million in 2003 from $17.4 million in 2002. Product cost of revenue was 36% and 58% of product net revenue in 2003 and 2002, respectively. Product cost of revenue in 2003 and 2002 are net of credits for the utilization of inventory previously reserved of $3.6 million and $2.5 million, respectively, of which $1.9 million and $2.5 million in 2003 and 2002 relates to the non-recurring $17.2 million inventory related charge recorded in 2001 as a result of industry downturn. The lower percentage in 2003 is primarily due to larger inventory utilization credits in 2003, lower costs associated with changes in our product mix in 2003, as well as cost reductions achieved with key suppliers and reductions of fixed costs. Service cost of revenue was 71% and 60% of service revenue in 2003 and 2002, respectively. The higher percentage in 2003 is primarily the result of increased service infrastructure aligned with current installed base.

Product cost of revenue as a percentage of net revenue is affected by changes in the mix of products sold, discounts, channels of distribution, changes in material costs, excess inventory and obsolescence charges, changes in volume and pricing competition. We anticipate product cost of revenue as a percentage of net revenue will increase in the future due to an expected increase in sales through distribution channels, which are typically at a higher discount.

Research and development expenses decreased $9.3 million to $46.5 million in 2003 from $55.8 million in 2002. The decrease in 2003 was primarily due to a reduction in personnel related costs as a result of restructuring programs implemented, lower project related costs and other discretionary spending reductions, partially offset by an increase in outside contract services.

Sales and marketing expenses decreased $2.6 million to $10.9 million in 2003 from $13.5 million in 2002. The decrease in 2003 was primarily due to a reduction in personnel related costs as a result of restructuring programs implemented, lower travel related costs and selective participation in marketing programs.

General and administrative expenses decreased $1.1 million to $6.1 million in 2003 from $7.2 million in 2002. The decrease in 2003 was primarily due to a reduction in personnel related costs as a result of restructuring programs implemented and other spending decreases.

Stock-based compensation, primarily associated with pre-IPO grants, decreased $3.1 million to $1.0 million in 2003 from $4.1 million in 2002. The decrease in 2003 is primarily the result of certain option grants becoming fully vested and the related compensation becoming fully amortized, as well as the forfeiture of stock options associated with employee terminations.

Interest income decreased $2.0 million to $2.2 million in 2003 from $4.2 million in 2002. The decrease in 2003 is primarily due to the decrease in invested cash balances resulting from the use of cash to fund operations in 2003 and lower investment yields available in the market.

Interest expense decreased $0.1 million to $0.1 million in 2003 from $0.2 million in 2002 primarily due to decreases in equipment financed through capital leases.

Other income increased $2.7 million to $3.0 million in 2003 from $0.3 million in 2002. The increase in 2003 is due to the expiration of certain customer credits totaling $3.0 million in 2003 that were previously recorded in deferred revenue.

We have not recorded a provision for income taxes because we have experienced net losses from our inception. As of December 31, 2003, we had net operating loss and tax credit carryforwards of approximately $295.5 million and $9.2 million, respectively. Approximately $13.1 million of Avici’s net operating loss carryforwards relate to deductions associated with Avici’s stock option plans, which will be benefited through stockholders’ equity if realized. The federal net operating loss carryforwards expire beginning in 2012 through 2023, and are subject to review and possible adjustment by the Internal Revenue Service (IRS). The utilization of the net operating loss carryforwards may be subject to annual limitations as a result of changes in the ownership of the Company. We did not record any tax benefits relating to these losses due to the uncertainty surrounding the realization of our deferred tax assets.

Since our inception, we have financed our operations through private sales of equity securities, an initial public offering in July 2000, and, to a lesser extent, equipment lease financing and the exercise of stock options by employees. From inception through December 31, 2004, we raised approximately $410.3 million from these equity offerings. In 2004, we used $24.2 million in cash for operating activities, compared to $22.0 million used in 2003, and $27.1 million used in 2002. The increase in cash usage in 2004 as compared to 2003 is a result of higher net loss before depreciation and non-cash compensation expenses, partially offset by a decrease in working capital. We expect working capital requirements will increase further in the future if product sales increase, creating larger customer receivable balances and the need to build inventory in advance of shipment. In addition, we expect to selectively invest in infrastructure costs needed to support the scale of operations.

Purchases of property and equipment were $6.9 million in 2004, compared to $5.5 million in 2003, and $10.0 million in 2002. Purchases of property and equipment decreased in 2004 and 2003, as compared to 2002 since we focused investments in 2004 and 2003 towards purchases of laboratory equipment and software required to support priority research and development projects, and to maintain and enhance the customer support infrastructure. The timing and amount of future capital expenditures will depend primarily on our future growth. We expect that capital expenditures will be between $8 million and $10 million in 2005. We expect that capital expenditure requirements may increase if product sales increase, creating a need for increased levels of test and management information systems equipment.

At December 31, 2004, we had cash and cash equivalents of $22.6 million, short-term marketable securities of $32.9 million, and long-term marketable securities of $13.5 million, totaling $69.0 million. In addition $0.2 million of restricted cash is included in Other Assets as deposits for facility related obligations. We believe that our existing cash, cash equivalents and marketable securities will meet our normal operating and capital expenditure needs for at least the next 12 months. However, we could be required, or could elect, to raise additional funds during that period and we may need to raise additional capital in the future. We may not be able to obtain additional capital on terms favorable to us or at all. The issuance of additional equity or equity-related securities would be dilutive to our stockholders. If we cannot raise funds on acceptable terms, or at all, we may not be able to develop or enhance our products or respond appropriately to competitive pressures, which would seriously limit our ability to increase our revenue and grow our business.

At December 31, 2004 our contractual obligations, which consist entirely of contractual commitments for operating leases and inventory purchase commitments, were as follows (in thousands):

Payments made under operating leases will be treated as rent expense for the facilities currently being utilized. We outsource the manufacture and assembly of our products. During the normal course of business, in order to maintain competitive lead times for customers and adequate supply of components, we enter into agreements with certain suppliers to procure inventory based upon criteria defined by us.

As of December 31, 2004, we did not have any off-balance-sheet arrangements, as defined in Item 303(a)(4)(ii) of SEC Regulation S-K.

In December 2004, the Financial Accounting Standards Board issued SFAS No. 123R, “Share Based Payment.” SFAS 123R is a revision of SFAS No. 123, “Accounting for Stock-Based Compensation,” and supersedes APB opinion No. 25, “Accounting for Stock Issued to Employees” and its related interpretations, and eliminates the alternative to use APB 25’s intrinsic value method of accounting, which Avici is currently using. SFAS 123R requires all share-based payments to employees, including grants of employee stock options, to be recognized in the financial statements based on their fair values. SFAS 123R is effective at the beginning of the first interim or annual period beginning after June 15, 2005. Avici will adopt this statement in the third quarter of 2005. The transition alternatives include prospective and retroactive adoption methods. Under the retroactive methods, prior periods may be restated either as of the beginning of the year of adoption or for all periods presented. The prospective method requires that compensation expense be recorded for all unvested stock options and share awards at the beginning of the first quarter of adoption of SFAS No. 123R, while the retroactive methods would record compensation expense for all unvested stock options and share awards beginning with the first period restated. Avici is currently evaluating the provisions of this statement to determine the impact on its consolidated financial statements. However, the adoption of this statement is expected to have a negative effect on its consolidated statements of operations.

We expect that substantially all of our revenues will be generated from a limited number of customers in the telecommunications industry. Our revenues will not grow if our products are not selected for or do not successfully pass field trial tests, or are not increasingly deployed in customer networks.

We currently have a limited number of customers. Three customers accounted for 99% of gross revenue in 2004. One customer accounted for 82% of gross revenue in 2003. Two customers accounted for 96% of gross revenue in 2002. We expect that in the foreseeable future substantially all of our revenues will continue to depend on sales of our products to a limited number of customers. The loss of any major customer could materially reduce our revenue and cash flow, and adversely affect our ability to achieve and maintain profitability. Our sales cycle typically involves a lengthy sales consultation process followed by laboratory

testing in which our product is evaluated against competing products. If our product is selected for field trials after laboratory testing, our product is then tested in an operational environment. Generally, our customers do not contractually commit to purchase any products from us until we have successfully demonstrated specific performance criteria in these field trials. We cannot predict whether our products will successfully complete laboratory tests or field trials with particular customers or whether these customers will order and commercially deploy our products in meaningful volumes. The failure of current or prospective customers to purchase our products for any reason, including the failure to pass field trials, any determination not to install our products in their networks or any downturn in their business, would seriously harm our ability to build a successful business. Even if we are successful in promoting the adoption of our products, customers usually test, purchase and deploy competitive products for various segments of their networks. Accordingly, we will likely face additional competitive challenges in further penetrating customer accounts.

In addition, we are dependent on factors affecting the telecommunications industry. The telecommunications industry has and may continue to experience consolidation, changing technical requirements and changing demand for services. Any such factors or other factors affecting the telecommunications industry or carrier customers could cause a downturn in the demand for our products.

We currently depend on a limited number of products offered in the core routing market segment and our future revenues depend on enhancements to these products and their commercial success.

Our future growth and revenue depend on the commercial success of our TSR, SSR and QSR products, which are the only products that we currently offer. We offer these products in the core routing market segment. We must continue to enhance the features and functionality of our products to meet customer requirements and competitive demands. In addition, the failure of these planned product enhancements to operate as expected could delay or prevent future sales of our products. If our target customers do not adopt, purchase and successfully deploy our products and our planned product enhancements, our revenues could decrease significantly.

We are likely to face difficulties in obtaining and retaining customers if we do not leverage our sales organization and our customer service and support operations with our third party distribution partners.

Our products require a sophisticated sales effort targeted at a limited number of key individuals within our target end user customers’ organizations. This effort requires specialized sales personnel and systems engineers. We continue to staff our direct sales force and plan to hire additional qualified sales personnel and systems engineers. The competition for these individuals is intense, and we might not be able to hire the type and number of sales personnel and systems engineers that we need to be successful. In addition, we believe that our future success is dependent upon our ability to establish successful relationships with a variety of systems integrators and distribution partners. To date, we have entered into agreements with a number of regional systems integrators and distribution partners, including Nortel Networks, on a worldwide basis, and Huawei Technologies in Greater China. These systems integrators and distribution partners do not have any purchase commitments associated with our agreements with them and, generally, are not prohibited from selling products that compete with our products. We cannot be certain that such partners will devote adequate resources to marketing or selling our product or generate significant revenue in order for us to achieve and maintain profitability.

The complexity of our products and the difficulty of installing them also require highly trained customer service and support personnel. We will need to effectively utilize our customer service and support organization to support a broader base of customers. Hiring customer service and support personnel is very competitive in our industry because there are a limited number of people available with the necessary technical skills and understanding of our market. In addition, once we hire these personnel, they may require extensive training in our product. If we are unable to expand our customer service and support organization and train them rapidly, or engage, manage and retrain third-party service and support organizations, we may not be able to adequately support our products which could materially decrease our revenues.

Our reliance on distribution partners to market and sell our products worldwide will cause our gross margins to decline.

We believe that our future success is dependent upon establishing and maintaining successful relationships with distribution partners. We have entered into agreements with several distribution partners. Gross margin on distribution sales are lower than those on direct sales. Accordingly, to the extent that a higher percentage of our revenue is derived from distribution sales, it is expected that our gross margin percentage will decline from current levels. There can be no assurance that incremental revenue from distribution channels will be sufficient to offset the decline in gross margin dollars.

Our failure to increase our revenues would prevent us from achieving and maintaining profitability.

We have incurred significant losses in each quarterly and annual period since inception and expect to continue to incur significant losses in the future. As of December 31, 2004, we had an accumulated deficit of $401.0 million. We cannot be certain that our revenues will increase or that we will generate sufficient revenues to achieve profitability. We plan to continue product development and to selectively increase the number of our engineering, sales, marketing and administrative employees. These efforts will require significant expenditures, a substantial portion of which we will make long before any significant revenue related to these expenditures may be realized. In addition, our operating expenses are based largely on anticipated revenue trends and a significant portion of our expenses, such as personnel and real estate facilities costs, is fixed. As a result, we will need to generate significant revenues to achieve and maintain profitability. If we fail to achieve significant increases in our revenues, our operating losses could materially increase. We may never achieve profitability or generate positive cash flows from operations. If we do achieve profitability or positive cash flows from operations in any period, we may not be able to sustain or increase profitability or positive cash flows in the future.

We rely on single or limited source suppliers for several key components. If we are unable to purchase these components on a timely basis or upon favorable terms, we will not be able to deliver our products to our customers within the timeframes required and we may experience order cancellations.

We currently specify and purchase through our contract manufacturers several key components from single or limited sources. We have worked with LSI Logic for over five years to develop several of our key proprietary application specific integrated circuits, or ASICs, which are custom designed integrated circuits built to perform a specific function more rapidly than a general purpose microprocessor. These proprietary ASICs are very complex and LSI Logic is currently our sole source supplier for them. We do not have a long-term, fixed-price or minimum volume of supply agreement with LSI Logic. Our ASICs generally require a lengthy lead-time. If required, we would likely be unable to develop an alternate source to LSI Logic in a timely manner, which could hurt our ability to deliver our products to our customers. We also purchase other critical components, including optical components, field programmable gate arrays and other ASICs, from sole or limited sources, and at times some of these components are subject to allocation. In addition we established a strategic relationship with Intel to supply certain network processors for use in our Multiservice Connect family of line cards and have also established other relationships for component supply. We do not have a long-term, fixed price or minimum volume of supply agreement with such vendors. Although we believe that there are alternative sources for many of these components, in the event of a disruption in supply, we may not be able to develop an alternate source in a timely manner or at favorable prices.

We typically specify and purchase through our contract manufacturers all of our components, including our ASICs, under purchase orders placed from time to time. We do not carry significant inventories of components and have no guaranteed supply arrangements with our vendors. If we are unable to purchase our critical components, or to provide for the production of our ASICs, at times and in volumes as our business requirements necessitate, we will not be able to manufacture and deliver our products to our customers in accordance with their volume and schedule requirements. If we are not able to satisfy the delivery requirements of our customers, they may reduce any future orders or eliminate our status as a vendor. Our reputation also would likely be harmed and, given the limited number of customers in our target market, we may not be able to replace any lost

business with new customers. In addition, even if we are able to obtain these critical components in sufficient volume and on schedules that permit us to satisfy our delivery requirements, we have little control over their cost. Accordingly, the lack of alternative sources for these components may force us to pay higher prices. If we are unable to obtain these components from our current suppliers or others at economical prices and favorable terms, our margins would be adversely impacted unless we could raise the prices of our products in a commensurate manner. The existing competitive conditions may not permit us to do so, in which case we may suffer increasing losses or reduced profits.

We have been in business for a short period of time and your basis for evaluating us is limited.

We were founded in November 1996, our TSR became commercially available during the fourth quarter of 1999, our SSR became commercially available during the fourth quarter of 2001, and our QSR became commercially available during the fourth quarter of 2002. Accordingly, we have limited meaningful historical financial data upon which to base projected revenues and planned operating expenses and upon which investors may evaluate our prospects and us. In addition, our limited operating history means that we have less insight into how technological and market trends may affect our business. The revenue and income potential of our business is unproven and the market that we are addressing is rapidly evolving. Our ability to sell our products depends on, among other things, the level of demand for intelligent high-speed routers. You should consider our business and prospects in light of the risks and difficulties frequently encountered by companies like ours in the early stages of development.

The long and variable sales cycle for our products may cause revenues and operating results to vary unexpectedly from quarter to quarter, which could affect the market price of our common stock.

A customer’s decision to purchase our products involves a significant commitment of its resources and a lengthy evaluation, testing and product qualification process. As a result, our sales cycle is likely to be lengthy. Throughout the sales cycle, we spend considerable time and expense educating and providing information to prospective customers about the use and features of our products. Even after our customers make a decision to purchase, we believe that our customers will deploy our products slowly and deliberately. The timing of deployment can vary widely and depends on the technical features and functionality available in our products, the size of the network deployment, the complexity of the customer’s network environment and the degree of hardware and software configuration necessary. Customers with significant or complex networks usually expand their networks in large increments on a periodic basis. Accordingly, we expect to receive purchase orders on an irregular and unpredictable basis. Because of our limited operating history and the nature of our business, we cannot predict these sales and deployment cycles. These long sales cycles, as well as our expectation that customers will tend to sporadically place large orders with short lead times, may cause our revenues, cash flows and results of operations to vary significantly and unexpectedly from quarter to quarter and the trading price of our common stock could decrease materially.

Our complex products may have errors or defects or may not interoperate within the networks of our customers, which could result in reduced demand for our products or costly litigation against us.

Our products are complex and are designed to be deployed in large and complex networks with large volumes of traffic. Accordingly, our products can only be fully tested when completely deployed in these types of networks. Despite deployment and internal testing, our customers may discover errors or defects in the hardware or the software, or the product may not operate as expected even after it has been fully deployed. In addition, many of our customers will require that our products be designed to interface with their existing networks, each of which may have different specifications and utilize multiple protocol standards. Our customers’ networks contain multiple generations of products that have been added over time as these networks have grown and evolved. Our products must interoperate with many of the products within these networks as well as future products in order to meet the requirements of our customers. Because our products are critical to the networks of our customers, any significant interruption in their service as a result of defects in our product or the failure of our product to interoperate within our customers’ networks could result in lost profits or damage to

these customers. These problems could cause us to incur significant service and warranty costs, divert engineering personnel from product development efforts and significantly impair our ability to maintain existing customer relations and attract new customers. Although our contracts with our customers generally contain provisions designed to limit our exposure to potential product liability claims, such as disclaimers of warranties and limitations on liability for special, consequential and incidental damages, a court might not enforce a limitation on our liability, which could expose us to additional financial loss. In addition, a product liability claim, whether successful or not, would likely be time consuming and expensive to resolve and would divert management time and attention. Further, if we are unable to fix the errors or other problems that may be identified in full deployment, we would likely experience loss of or delay in revenues and loss of market share and our business and prospects would suffer.

Our failure to compete effectively, particularly against Cisco Systems, Juniper Networks, and other established participants with greater financial and other resources than ours, could limit our ability to increase our market share.

The competition in the network infrastructure equipment market is intense. This market historically has been dominated by Cisco Systems, although we also compete with other companies such as Juniper Networks. Our prospective customers may be reluctant to replace or expand their current infrastructure solutions, which may be supplied by one or more of these more established competitors, with our products. Further, many of our competitors have greater selling and marketing, technical, manufacturing, financial and other resources, more customers, greater market recognition and more established relationships and alliances in the industry. As a result, these competitors may be able to develop, enhance and expand their product offerings more quickly, adapt more swiftly to new or emerging technologies and changes in customer demands, devote greater resources to the marketing and sale of their offerings, pursue acquisitions and other opportunities more readily and adopt more aggressive pricing policies. In addition, established or emerging network equipment vendors may also focus on our target market, thereby further intensifying competition. In order to compete effectively with these competitors, we must demonstrate that our products are superior in meeting the needs of carriers and provide high levels of reliability, scalability and interoperability in a cost-effective manner.

In addition, we believe that understanding the infrastructure requirements of telecommunications carriers and other service providers, experience in working with these providers to develop new services for their customers and an ability to provide vendor-sponsored financing are important competitive factors in our market. We have limited experience in working with telecommunications carriers and other service providers. In addition, we do not currently have the ability to provide vendor-sponsored financing and this may influence the purchasing decision of prospective customers, which may decide to purchase products from one of our competitors that offers such financing.

If we are unable to compete successfully against our current and future competitors, we could experience order cancellations, lost customer opportunities and price reductions. If this occurs, our revenues may not grow, our gross margins could decrease and we could experience additional material losses.

We depend upon contract manufacturers and any disruption in these relationships may cause us to fail to meet the demands of our customers and damage our customer relationships.

We do not have internal manufacturing capabilities. We rely on a small number of contract manufacturers to manufacture our products in accordance with our specifications and to fill orders on a timely basis. These contract manufacturers procure material on our behalf and provide comprehensive manufacturing services, including assembly, test and control. We have historically been dependent on two contract manufacturers, Sanmina-SCI Corporation and Celestica Corporation. We may not be able to effectively manage our relationships with these contract manufacturers and they may not meet our future requirements for timely delivery and quality or may not be on terms favorable to us. If we experience increased demand for our products, the challenges we face in managing our relationships with these manufacturers will be increased. Each of our contract manufacturers also builds products for other companies, and we cannot be certain that they will always have

sufficient quantities of inventory available to fill orders placed by our customers, or that they will allocate their internal resources to fill these orders on a timely basis. Qualifying a new contract manufacturer and commencing volume production is expensive and time consuming and could result in a significant interruption in the supply of our product. If we are required or choose to change one or both of our contract manufacturers, we could experience a material loss in our revenue and significant damage to our customer relationships.

If we fail to accurately predict our manufacturing requirements, we could incur additional costs or experience manufacturing delays.

Our contract manufacturers are not obligated to supply products to us for any specific period, in any specific quantity or at any certain price, except as may be provided in a particular purchase order. We generally provide forecasts of our demand to these manufacturers up to 12 months prior to scheduled delivery of product to our customers. If we overestimate our requirements, we may purchase excess inventory, which would increase our costs as we have to take additional charges for excess and obsolete inventory. If we underestimate our requirements, we may have an inadequate amount of inventory, which could result in delays in delivery to our customers and in recognition of revenue. In addition, the lead times for materials and components we order vary significantly and depend on factors such as the specific supplier, contract terms and demand for each component at a given time. We also may experience shortages of other components from time to time, which also could delay the manufacturing of our products and delay our recognition of revenue.

The unpredictability of our quarterly results of operations may adversely affect the trading price of our common stock.

Our quarterly operating results are likely to vary significantly in the future based on a number of factors related to our industry, the markets for our products and how we manage our business. We have little or no control over many of these factors and any of these factors could cause the price of our common stock to fluctuate significantly. In addition to the risks discussed elsewhere in this section, the following may also adversely affect the trading price of our common stock:

We plan to selectively increase our operating expenses to fund greater levels of research and development, expand our sales and marketing operations, broaden our customer support capabilities, and develop new distribution channels in line with projected growth. Our operating expenses are largely based on anticipated organizational growth and revenue trends and a high percentage of our expenses are, and will continue to be, fixed in the short term. As a result, if revenue for a particular quarter is below our expectations for any of the reasons set forth above, or for any other reason, we may not be able to proportionately reduce operating expenses for that quarter. Accordingly, this revenue shortfall would have a disproportionate effect on our expected operating results and could result in material operating losses for that quarter, which could result in significant variations in our operating results from quarter to quarter.

Due to the foregoing factors, we believe that quarter-to-quarter comparisons of our operating results are not a good indication of our future performance. You should not rely on our results or growth for any single quarter as an indication of our future performance. It is likely that in some future quarters, our operating results may be below the expectations of public market analysts and investors. In this event, the price of our common stock may decline.

If we do not respond effectively and on a timely basis to rapid technological changes, our products could become obsolete and we would probably be unable to attract new customers.

The market for high-speed core router products has been and is likely to continue to be characterized by rapid technological change, evolving industry standards, and frequent new product introductions. The introduction of new products by competitors, market acceptance of products based on new or alternative technologies or the emergence of new industry standards could render our existing or future products obsolete. Accordingly, we may be required to make significant and ongoing investments in future periods in order to remain competitive. The development of new products or technologies is a complex and uncertain process that requires the accurate anticipation of technological and market trends. We may be unable to respond quickly or cost-effectively to these developments, and we may not be able to obtain the necessary funds to develop or acquire new technologies or products needed to compete. We also cannot assure you that any products we do develop will gain market acceptance.

In addition, in order to introduce products incorporating new technologies and new industry standards, we must be able to gain access to the latest technologies used by our customers, our suppliers and other network vendors. Any failure to gain access to the latest technologies could impair our ability to develop competitive products.

Cisco’s leadership position in our market could create technical challenges to our ability to sell our products.

In developing our products, we have made, and will continue to make, assumptions about the standards that may be adopted by our customers and competitors. If the standards adopted are different from those that we have chosen to support, market acceptance of our products would likely be significantly reduced and our business will be seriously harmed. Because Cisco maintains a leadership position in selling products that currently comprise the infrastructure of the Internet, Cisco may have the ability to establish de facto standards within the industry. Any actions by Cisco that diminish compliance by our products with industry or de facto standards or the ability of our products to interoperate with other Internet-related products would be damaging to our reputation and our ability to generate revenue.

Customer requirements are likely to evolve, and we will not retain customers or attract new customers if we do not anticipate and meet specific customer requirements.

Our future success will also depend upon our ability to develop and manage key customer relationships in order to introduce a variety of new products and product enhancements that address the increasingly sophisticated needs of our customers. Our current and prospective customers may require product features and capabilities that our products do not have. We must effectively anticipate and adapt to customer requirements and offer products that meet those demands in a timely manner. Our failure to develop products that satisfy customer requirements would seriously harm our ability to achieve market acceptance for our products. In addition, we may experience design, manufacturing, marketing and other difficulties that could delay or prevent our development, introduction or marketing of new products and enhancements. Material delays in introducing new products may cause customers to forego purchases of our products and purchase those of our competitors, which could seriously harm our business. The introduction of new or enhanced products also requires that we manage the transition from older products in order to minimize disruption in customer ordering patterns and ensure that adequate supplies of new products can be delivered to meet anticipated customer demand. Our inability to effectively manage this transition would cause us to lose current and prospective customers.

Our ability to develop, market and support products depends on retaining our management team and attracting and retaining highly qualified individuals in our industry.

Our future success depends on the continued services of our management team, which has significant experience with the data communications, telecommunications and Internet infrastructure markets, as well as

relationships with many of the communications service providers and business partners that we currently or may in the future rely on in implementing our business plan. The loss of the services of our management team or any key executive could have a significant detrimental effect on our ability to execute our business strategy.

Our future success also depends on our continuing ability to selectively identify, hire, train, assimilate and retain highly qualified engineering, sales, marketing, managerial and support personnel. The demand and competition for qualified personnel is high, and we have from time to time experienced, and we expect to continue to experience in the future, difficulty in hiring and retaining highly skilled employees with appropriate qualifications. In particular, we have experienced difficulty in hiring qualified ASIC, software, systems and test and customer support engineers. The loss of the services of any of our key employees, the inability to attract or retain qualified personnel in the future or delays in hiring required personnel, particularly engineers and sales personnel, could delay the development and introduction of and negatively impact our ability to sell our products.

We face risks associated with our international expansion that could impair our ability to grow our revenues abroad.

We intend to expand our presence in international markets. Our international sales are conducted through a direct sales force, sales agents, systems integrators, and distributors in Europe, Asia, and Latin America. In January 2004, we established a strategic relationship with Nortel Networks to market, sell and support our products on a worldwide basis. In 2003, we also established a strategic relationship with Huawei Technologies to resell our products in Greater China and also have established regional partners in Europe, Japan, Asia, and Latin America. Our international presence will require significant management attention and financial resources to successfully develop our direct and indirect international sales and support channels and our success will be dependent upon the commitment of resources by these distribution partners in the international markets.

We have limited experience in marketing and distributing our products internationally and we expect that we will need to develop versions of our product that comply with local standards. We may not be able to develop international market demand for our products. In addition, our international operations will expose us to a number of risks that we do not have to address in our domestic operations, including:

We expect that our international sales will be generally denominated in United States dollars. As a result, increases in the value of the United States dollar relative to foreign currencies would cause our products to become less competitive in international markets and could result in limited, if any, sales and profitability. To the extent that we denominate sales in foreign currencies or incur significant operating expenses denominated in local currencies, we will be exposed to increased risks of currency exchange rate fluctuations.

We may experience difficulty in identifying, acquiring and integrating acquisition candidates.

We may supplement our internal growth by acquiring complementary businesses, technologies or product lines. We may not be able to identify and acquire suitable candidates on reasonable terms. We compete for acquisition candidates with other companies that have substantially greater financial, management and other resources than we do. If we do complete an acquisition, then we may face numerous business risks. These risks include difficulties in assimilating the acquired operations, technologies, personnel and products, difficulties in managing geographically dispersed and international operations; difficulties in assimilating diverse financial reporting and management information systems; the diversion of management’s attention from other business concerns; the potential disruption of our business; and the potential loss of key employees, customers, distributors or suppliers. We may finance acquisitions by issuing shares of our common stock, which could dilute our existing stockholders. We may also use cash or incur additional debt to pay for these acquisitions. In addition, we may be required to expend substantial funds to develop acquired technologies. We may also be required to amortize significant intangible assets in connection with future acquisitions, which could adversely affect our operating results.

Our intellectual property protection may be inadequate to protect our proprietary rights, and we may be subject to infringement claims that could subject us to significant liability and divert the time and attention of our management.

We regard our products and technology as proprietary. We attempt to protect them through a combination of patent protection, copyrights, trademarks, trade secret laws, contractual restrictions on disclosure and other methods. These methods may not be sufficient to protect our proprietary rights. We presently have over ten patents granted in the United States and over forty United States and foreign patent applications pending. We cannot be certain that patents will be granted based on these or any other applications, or that, even if issued, the patents will adequately protect our technology. We also generally enter into confidentiality agreements with our employees, consultants and customers, and generally control access to and distribution of our documentation and other proprietary information. Despite these precautions, it may be possible for a third party to copy or otherwise misappropriate and use our products or technology without authorization, particularly in foreign countries where the laws may not protect our proprietary rights to the same extent as do the laws of the United States, or to develop similar technology independently. We may need to resort to litigation in the future to enforce our intellectual property rights, to protect our trade secrets or to determine the validity and scope of the proprietary rights of others. This litigation could result in substantial costs and diversion of resources and could harm our business.

We also license technologies from third parties, some of which we license without indemnification from the licensor for infringement of third party intellectual property rights. We are continuing to develop and acquire additional intellectual property. Although we have not been involved in any litigation relating to our intellectual property, including intellectual property that we license from third parties, we expect that participants in our markets will be increasingly subject to infringement claims. Third parties may try to claim our products infringe their intellectual property. Any claim, whether meritorious or not, could be time consuming, result in costly litigation and/or require us to enter into royalty or licensing agreements. Although we carry general liability insurance, our insurance may not cover potential claims of this type or may not be adequate to indemnify us for all liability that may be imposed. In addition, any royalty or licensing agreements might not be available on terms acceptable to us or at all, in which case we would have to cease selling, incorporating or using the products that incorporate the challenged intellectual property and expend substantial amounts of resources to redesign our products. If we are forced to enter into unacceptable royalty or licensing agreements or to redesign our products, our business and prospects would suffer.

We are uncertain of our ability to obtain additional financing for our future capital needs.

We expect our current cash, cash equivalents and marketable securities will meet our normal working capital and capital expenditure needs for at least the next twelve months. We may need to raise additional

funding at that time or earlier if we decide to undertake more rapid expansion, including acquisitions of complementary products or technologies, or if we increase our marketing and/or research and development efforts in order to respond to competitive pressures. We cannot be certain that we will be able to obtain additional financing on favorable terms, if at all. We may obtain additional financing by issuing shares of our common stock, which could dilute our existing stockholders. If we cannot raise needed funds on acceptable terms, or at all, we may not be able to develop or enhance our products or respond appropriately to competitive pressures, which would seriously harm our business.

The market price of our common stock may be materially adversely affected by market volatility.

The price at which our common stock trades is highly volatile and fluctuates substantially. Given the limited volume of our product sales and our limited number of customers, the announcement of any significant customer developments, awards or losses or of any significant partnerships or acquisitions by us or our competitors could have a material adverse effect on our stock price. In addition, the stock market in general has, and technology companies in particular have, from time to time experienced extreme price and volume fluctuations that have often been unrelated or disproportionate to the operating performance or prospects of such companies.

In the past, securities class action litigation has often been brought against companies following periods of volatility in the market price of their securities. Those companies, like us, that are involved in rapidly changing technology markets are particularly subject to this risk. Securities class action lawsuits have been filed against us in the United States District Court for the Southern District of New York. The consolidated amended complaint generally alleges that our offering documents failed to disclose certain underwriting fees and commissions and underwriter tie-ins and other arrangements with certain customers of the underwriters that impacted the price of our common stock in the after-market. The plaintiffs are seeking unspecified damages. We believe that the claims in this case against us lack merit, and we have defended the litigation vigorously.

We can provide no assurance as to the outcome of this securities litigation. Any conclusion of this litigation in a manner adverse to us could have a material adverse effect on our business, financial condition, results of operations and cash flows. In addition, the cost to us of defending the litigation, even if resolved in our favor, could be substantial. Such litigation could also substantially divert the attention of our management and our resources in general. Uncertainties resulting from the initiation and continuation of this litigation could harm our ability to compete in the marketplace. Because the price of our common stock has been, and may continue to be, volatile, we can provide no assurance that additional securities litigation will not be filed against us in the future.

The market price of our common stock might decline due to future non-cash charges to earnings.

In December 2004, the Financial Accounting Standards Board issued SFAS No. 123R, “Share Based Payment.” SFAS 123R requires all share-based payments to employees, including grants of employee stock options, to be recognized in the financial statements based on their fair values. Avici will adopt this statement in the third quarter of 2005 and is currently evaluating the provisions of this statement to determine the impact on its consolidated financial statements. The adoption of this statement may have a material impact on its future earnings. It may not be possible to calculate the future impact with respect to stock-based grants as the amount of these charges to earnings fluctuates with the price of our common stock and other factors. It is possible that some investors might consider this impact on operating results to be material, which could result in a decline in the price of our common stock. In addition, since 2000 we amortized against revenue, non-cash charges relating to the issuance of common stock warrants to a customer. In January 2004, in connection with a three-year strategic OEM agreement with Nortel Networks we issued a warrant to purchase shares of Avici common stock. The fair value of the warrant was calculated to be approximately $6.3 million using the Black-Scholes valuation model, and is being recorded as a reduction of revenue on a systematic basis over the economic life of the OEM agreement, which is expected to be three years.

Our estimates and judgments related to critical accounting policies could be inaccurate.

We consider accounting policies related to revenue recognition, cost of revenue – service, inventory valuation, warranty liabilities and long lived assets to be critical in fully understanding and evaluating our financial results. Management makes certain significant accounting judgments and estimates related to these policies. Our business, operating results and financial condition could be materially and adversely impacted in future periods if our accounting judgments and estimates related to these critical accounting policies prove to be inadequate.

Any failure to maintain and enhance our internal information systems or to implement internal controls over financial reporting could adversely impact our business.

We must continue to maintain and enhance our internal information systems in order to manage our business operations. We must also maintain internal controls over financial reporting in accordance with The Sarbanes-Oxley Act of 2002 (“Sarbanes-Oxley”). Our disclosure controls and procedures and internal controls over financial reporting may not prevent all errors and intentional misrepresentations. Any system of internal control can only provide reasonable assurance that all control objectives are met. Some of the potential risks involved could include but are not limited to management judgments, simple errors or mistakes, willful misconduct regarding controls or misinterpretation. There is no guarantee that existing controls will prevent or detect all material issues or that existing controls will be effective in future conditions, which could materially and adversely impact our financial results. Under Sarbanes-Oxley, we are required to evaluate and determine the effectiveness of our internal controls over financial reporting. Compliance with this legislation will require management’s attention and resources and will cause us to continue to incur significant expense. Management’s assessment of our internal controls over financial reporting may identify weaknesses that need to be addressed in our internal controls over financial reporting or other matters that may raise concerns for investors. Should we determine that we have material weaknesses in our internal controls over financial reporting, our results of operations or financial condition may be materially adversely affected or the price of our common stock may decline.

Our charter documents, Shareholder Rights Plan, and Delaware law could inhibit a takeover that some stockholders may consider favorable.

There are provisions of Delaware law and our charter, by-laws, and Shareholder Rights Plan that could make it more difficult for a third party to acquire us, even if doing so would be beneficial to some of our stockholders by providing them the opportunity to sell their shares at a premium over the market price. If a change of control or change in management is delayed or prevented, the market price of our common stock could be affected.

We are exposed to market risk related to changes in interest rates and foreign currency exchange rates. We do not use derivative financial instruments for speculative or trading purposes.

We maintain an investment portfolio consisting mainly of investment grade money market funds, corporate obligations, federal agency obligations, state and municipal bonds with a weighted-average maturity of less than one year. These held-to-maturity securities are subject to interest rate risk and will fall in value if market interest rates increase. If market interest rates were to increase immediately and uniformly by 10% from levels at December 31, 2004, the fair market value of these investments would decline by an immaterial amount. We have the ability to hold our fixed income investments until maturity. Therefore, we would not expect our operating results or cash flows to be affected to any significant degree by a sudden change in market interest rates on our securities portfolio. The following table provides information about our investment portfolio. For investment securities, the table presents principal cash flows and related weighted average interest rates by expected maturity dates.

We operate primarily in the United States, and all sales to date have been made in U.S. dollars. Accordingly, there has not been any material exposure to foreign currency rate fluctuations. If we expand our presence in international markets and consummate sales denominated in foreign currencies, our exposure to foreign currency rate fluctuations could be material in the future.

Avici has no off-balance sheet concentrations such as foreign exchange contracts, option contracts, or other foreign hedging arrangements.

We have audited the accompanying consolidated balance sheets of Avici Systems Inc. and subsidiaries as of December 31, 2004 and 2003 and the related consolidated statements of operations, stockholders’ equity and cash flows for each of the three years in the period ended December 31, 2004. Our audits also included the financial statement schedule listed in the Index at Item 15(a). These financial statements and schedule are the responsibility of the Company’s management. Our responsibility is to express an opinion on these financial statements and schedule based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the consolidated financial position of Avici Systems Inc. and subsidiaries as of December 31, 2004 and 2003, and the result of its operations and its cash flows for each of the three years in the period ended December 31, 2004, in conformity with U.S. generally accepted accounting principles. Also, in our opinion, the related financial statement schedule, when considered in relation to the basic financial statements taken as a whole, presents fairly in all material respects the information set forth therein.

We have also audited in accordance with the standards of the Public Company Accounting Oversight Board (United States) the effectiveness of Avici Systems Inc.’s internal control over financial reporting as of December 31, 2004, based upon the criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission and our reported dated March 7, 2005, expressed an unqualified opinion thereon.

The accompanying notes are an integral part of these consolidated financial statements.

Avici Systems Inc. and subsidiaries (Avici or the Company) was incorporated in the State of Delaware on November 12, 1996 and was organized to design and develop high-speed data networking equipment for the carrier market. Avici’s Terabit Switch Router product (TSR), Stackable Switch Router (SSR) and Quarter-rack Switch Router (QSR) are designed to cost-effectively provide high-speed/high-volume capacity, carrier-class reliability and in-service scalability, or the ability to incrementally add capacity to the network without disrupting network performance.

Avici is devoting significant efforts toward product research and development. As such, it is subject to a number of risks and challenges similar to other companies in a similar stage of development. These risks include, but are not limited to, dependence on few customers, dependence on key individuals, dependence on contract manufacturers and key suppliers of integral components, the need to develop and market commercially usable products, the ability to obtain adequate financing to support growth and product development and competition from substitute products and larger companies with greater financial, technical, management and marketing resources.

Avici incurred net losses of approximately $35.4 million, $37.0 million and $64.8 million, for the years ended December 31, 2004, 2003 and 2002, respectively. At December 31, 2004, Avici had an accumulated deficit of approximately $401.0 million and has funded those losses through the sale of redeemable convertible preferred stock, the proceeds from the sale of its common stock and certain capital leases. Avici is dependent on the proceeds of these financings to meet its future working capital and research and development needs.

The accompanying consolidated financial statements reflect the application of certain significant accounting policies as described in this note and elsewhere in these notes to consolidated financial statements.

Avici recognizes revenue from product sales upon shipment, provided that a purchase order has been received or a contract has been executed, there are no uncertainties regarding customer acceptance, the sales price is fixed or determinable and collectibility is deemed probable. If uncertainties regarding customer acceptance exist, Avici recognizes revenue when those uncertainties are resolved. For arrangements that include the delivery of multiple elements, revenue is allocated to the various elements based on vendor-specific objective evidence of fair value (VSOE). Avici uses the residual method when VSOE does not exist for one of the delivered elements in an arrangement. Revenue from support and maintenance contracts is recognized ratably over the period of the related agreements. Revenue from installation and other services is recognized as the work is performed. Amounts collected or billed prior to satisfying the above revenue recognition criteria are recorded as deferred revenue.

Avici follows the provisions of Statement of Financial Accounting Standards (SFAS) No. 115, Accounting for Certain Investments in Debt and Equity Securities. Avici has classified its cash equivalents and investments as held-to-maturity and recorded them at amortized cost, which approximates market value. Unrealized losses are primarily due to rising interest rates and are considered temporary in nature. Avici considers all highly liquid investments with original maturities of three months or less at the date of acquisition to be cash equivalents. Cash and cash equivalents include money markets, certificates of deposit and commercial paper. As of December 31, 2004, investments consisted of the following:

The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions, including certain allocations of costs, that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates.

Inventories are stated at the lower of cost (first-in, first-out) or market and consist of the following:

We regularly review inventory quantities on hand and inventory commitments with suppliers and record a provision for excess and obsolete inventory based primarily on our estimated forecast of product demand for up to the next twelve months. Purchase commitments accrued at December 31, 2004 and 2003 were $0.3 million and $0.5 million, respectively.

Property and equipment are stated at cost, net of accumulated depreciation and amortization. Expenditures for maintenance and repairs are charged to expense as incurred, whereas major betterments are capitalized as

additions to property and equipment. Avici provides for depreciation and amortization on the straight-line basis and charges to operations amounts that allocate the cost of the assets over their estimated useful lives as follows:

Accumulated amortization expense and amortization expense on equipment under capital leases is included in accumulated depreciation and depreciation expense, respectively. Depreciation and amortization expense was $9.3 million, $22.2 million and $24.1 million for the years ended December 31, 2004, 2003 and 2002, respectively.

In accordance with SFAS No. 144, Accounting for the Impairment or Disposal of Long-Lived Assets, Avici reviews property, plant, and equipment for impairment whenever events or changes in circumstances indicate that the carrying amount of such an asset may not be recoverable. Except for certain restructuring activities undertaken during fiscal 2001 and 2002 as disclosed in Note 2, no revision to the estimated useful life or recorded amount of property and equipment was required.

SFAS No. 105, Disclosure of Information about Financial Instruments with Off-Balance Sheet Risk and Financial Instruments with Concentrations of Credit Risk, requires disclosure of any significant off-balance sheet and credit risk concentrations. Avici’s principal credit risk relates to its cash, cash equivalents, investments and accounts receivable. Avici invests its excess cash, cash equivalents and investments primarily in deposits with commercial banks and high-quality corporate securities. Three customers accounted for 99% of the gross revenue in 2004. One customer accounted for 82% of gross revenue in 2003. Two customers accounted for 96% of the gross revenue in 2002. Two customers accounted for 97% of trade receivables at December 31, 2004 and 2003.

Avici has no off-balance sheet concentrations such as foreign exchange contracts, option contracts, or other foreign hedging arrangements.

Certain key components used in Avici’s products are procured from single or limited source suppliers, and Avici relies on single or limited contract manufacturers for the assembly of its products. The failure of a supplier, including a contract manufacturer, to deliver on schedule could delay or interrupt Avici’s delivery of products and thereby adversely affect Avici’s revenues and operating results.

Avici’s financial instruments mainly consist of cash and cash equivalents, investments, trade accounts receivable, subscriptions receivable and accounts payable. The carrying amounts of these instruments approximate their fair value based on their short-term maturity or quoted market prices.

The costs of the development of hardware products and enhancements to existing hardware products are expensed as incurred. Avici accounts for its software development costs in accordance with SFAS No. 86,

Accounting for the Costs of Computer Software to Be Sold, Leased or Otherwise Marketed. Accordingly, the costs for the development of new software that are included in the hardware products and substantial enhancements to such existing software are expensed as incurred until technological feasibility has been established, at which time any additional costs would be capitalized. Avici determines technological feasibility has been established at the time at which a working model of the software has been completed. Because Avici believes its current process for developing software is essentially completed concurrently with the establishment of technological feasibility, no costs have been capitalized to date.

Basic and diluted net loss per share are presented in conformity with SFAS No. 128, Earnings per Share, for all periods presented. In accordance with SFAS No. 128, basic and diluted net loss per common share was determined by dividing net loss available for common stockholders by the weighted average common shares outstanding during the period, less shares subject to repurchase. Basic and diluted net loss per share are the same because all outstanding common stock options have been excluded, as they are considered antidilutive. Options to purchase a total of 2,840,267, 3,301,912 and 2,930,634 common shares have been excluded from the computations of diluted weighted average shares outstanding for the years ended December 31, 2004, 2003 and 2002, respectively. In addition, 99,604 shares, 729 shares and 60,683 shares of unvested restricted common stock have been excluded from the computation of diluted weighted average shares outstanding for the years ended December 31, 2004, 2003 and 2002, respectively.

SFAS No. 130, Reporting Comprehensive Income, requires disclosure of all components of comprehensive income on an annual and interim basis. Comprehensive income is defined as the change in equity of a business enterprise during a period from transactions and other events and circumstances involving nonowner sources. During all periods presented, Avici did not have any items of comprehensive income (loss) other than its reported net loss.

SFAS No. 123 requires the measurement of the fair value of stock options or warrants to be included in the consolidated statement of operations or disclosed in the notes to the consolidated financial statements. Avici accounts for stock-based compensation for employees in accordance with the intrinsic value method under APB Opinion No. 25 and has elected the disclosure-only alternative under SFAS No. 123, which requires disclosure of the pro forma effects on earnings as if the fair-value-based method of accounting under SFAS No. 123 had been adopted, as well as certain other information.

Avici has computed the pro forma disclosures required under SFAS No. 123 for stock option grants during 2004, 2003 and 2002, using the Black-Scholes option pricing model prescribed by SFAS No. 123, using the following assumptions:

The assumptions used for awards under Avici’s employee stock purchase plan were the same as those listed above, except that an expected life of six to twenty four months was used for each period. If compensation cost had been determined for stock option grants to employees based on the provisions of SFAS No. 123, Avici’s net loss and net loss per share for the years ended December 31, 2004, 2003 and 2002 would have increased to the pro forma amounts indicated below:

The Black-Scholes option pricing model was developed for use in estimating the fair value of traded options that have no vesting restrictions and are fully transferable. In addition, option pricing models require the input of highly subjective assumptions, including expected stock price volatility. Because Avici’s employee stock option grants have characteristics significantly different from those of traded options, and because changes in the subjective input assumptions can materially affect the fair value estimate, in management’s opinion, the existing models do not necessarily provide a reliable single measure of the fair value of its employee stock and option grants.

SFAS No. 131, Disclosures about Segments of an Enterprise and Related Information, establishes standards for reporting information regarding operating segments and establishes standards for related disclosures about products and services and geographic areas. Operating segments are identified as components of an enterprise about which separate discrete financial information is available for evaluation by the chief operating decision maker, or decision making group, in making decisions regarding resource allocation and assessing performance. Avici has determined that it conducts its operations in one segment. For the year ended December 31, 2004, the geographic distribution of gross revenue was as follows: North America: 73%, Asia: 27%. For the year ended December 31, 2003, the geographic distribution of gross revenue was as follows: North America: 96%, Asia: 4%. For the year ended December 31, 2002, the geographic distribution of gross revenue was as follows: North America: 97%, Asia: 3%.

The consolidated financial statements include the accounts of Avici Systems Inc. and all of its wholly owned subsidiaries after elimination of intercompany accounts and transactions.

In December 2004, the Financial Accounting Standards Board issued SFAS No. 123R, “Share Based Payment.” SFAS 123R is a revision of SFAS No. 123, “Accounting for Stock-Based Compensation,” and

supersedes APB opinion No. 25, “Accounting for Stock Issued to Employees” and its related interpretations, and eliminates the alternative to use APB 25’s intrinsic value method of accounting, which Avici is currently using. SFAS 123R requires all share-based payments to employees, including grants of employee stock options, to be recognized in the financial statements based on their fair values. SFAS 123R is effective at the beginning of the first interim or annual period beginning after June 15, 2005. Avici will adopt this statement in the third quarter of 2005. The transition alternatives include prospective and retroactive adoption methods. Under the retroactive methods, prior periods may be restated either as of the beginning of the year of adoption or for all periods presented. The prospective method requires that compensation expense be recorded for all unvested stock options and share awards at the beginning of the first quarter of adoption of SFAS No. 123R, while the retroactive methods would record compensation expense for all unvested stock options and share awards beginning with the first period restated. Avici is currently evaluating the provisions of this statement to determine the impact on its consolidated financial statements. However, the adoption of this statement is expected to have a negative effect on its consolidated statements of operations.

Certain reclassifications have been made to prior period balances in order to conform to the current presentation.

Avici implemented restructuring programs in 2001 and 2002 and recorded cumulative net charges of $2.0 million. In 2004, Avici paid $0.4 million in lease payments associated with those charges. As of December 31, 2004, all liabilities associated with these programs have been liquidated.

During the third quarter of 2002, the Board of Directors authorized a share repurchase program, in effect for a one year period, to acquire up to 1.5 million shares of Avici’s common stock in the open market at times and prices considered appropriate by Avici. The share buyback program was initiated during the fourth quarter of 2002, and during the program Avici purchased 482,308 shares at an aggregate cost of approximately $2.1 million. The share repurchase program terminated during the third quarter of 2003.

from Avici for its own use or for resale. The warrant is nonforfeitable and has a term of approximately seven years from the date of issuance and is exercisable after seven years. The right to exercise the warrant may be accelerated if Nortel Networks achieves certain performance milestones. The fair value of the warrant was calculated to be approximately $6.3 million using the Black-Scholes valuation model, and is recorded as a reduction of revenue on a systematic basis, currently straight-line, over the economic life of the agreement, which is expected to be three years. The unamortized balance of $4.2 million at December 31, 2004 is recorded as a Contract Distribution Right in the accompanying balance sheet.

Avici currently has two primary stock incentive plans: the 1997 Stock Incentive Plan (the “1997 Plan”) and the 2000 Stock Option and Incentive Plan (the “2000 Plan”). A total of 4,398,093 shares of common stock have been reserved for issuance under these plans. The 2000 Plan is the only one of the two primary plans under which new awards are currently being issued. The maximum number of shares with respect to which awards may be granted to any employee under the 2000 Plan shall not exceed 500,000 shares of common stock during any calendar year. In addition, any shares not yet issued under the 1997 Plan on or before the date of Avici’s initial public offering or shares subject to options outstanding on the date of Avici’s initial public offering which are forfeited or terminated are available for issuance under the 2000 Plan.

The Plans provide for the grant of stock-based awards to Avici’s employees, officers, directors, consultants and advisors. Under the Plans, Avici may grant options that are intended to qualify as incentive stock options within the meaning of Section 422 of the Internal Revenue Code, options not intended to qualify as incentive stock options, restricted stock and other stock-based awards. Incentive stock options may be granted only to employees of Avici.

As of December 31, 2004, 1,627,826 shares were available for future grant under the Plans.

In May 2000, the Board of Directors approved the 2000 Nonemployee Director Stock Option Plan (the “Director Plan”). A total of 100,000 shares of common stock have been authorized for issuance under the Director Plan. On January 1 of each year, commencing with January 1, 2001, the aggregate number of shares available for grant under the plan will automatically increase by the number of shares necessary to cause the total number of shares then available for grant to be 100,000 shares.

The Director Plan is administered by the compensation committee. Under the Director Plan, each nonemployee director who becomes a member of the Board of Directors will be automatically granted on the date first elected to the Board of Directors an option to purchase 8,750 shares of common stock, which will vest in four equal installments over four years. In addition, provided that the director continues to serve as a member

of the Board of Directors, each nonemployee director will be automatically granted on the date of each annual meeting of stockholders following his or her initial option grant date an option to purchase 3,750 shares of common stock, 1,250 shares of which will vest immediately and 2,500 shares of which will vest in four equal installments over four years. Avici granted a total of 50,000 options to its nonemployee directors at the time of Avici’s initial public offering. Such options vest in four equal installments over four years.

As of December 31, 2004, 100,000 shares were available for future grant under the Director Plan.

The following table summarizes information relating to currently outstanding and exercisable stock options as of December 31, 2004:

In fiscal 2000, Avici granted an officer the right to purchase 25,000 shares of restricted stock and, in connection with the purchase, loaned the individual $2,500,000. These shares vested ratably over a 12 month period. The loan was non-interest-bearing with limited recourse to the individual was secured by the restricted securities. The loan had a maturity of 10 years, to be repaid from the proceeds of the sale of the related restricted securities, if such sale precedes the maturity date. In 2004 upon the officer’s termination of employment, the 25,000 shares were returned to the company and the loan cancelled. As a result of the limited recourse nature of this note, the issuance and its related cancellation were treated similar to the issuance and cancellation of a stock option.

A total of 187,500 shares of common stock have been reserved for issuance under the 2000 Employee Stock Purchase Plan. The plan contains consecutive, overlapping, 24-month offering periods. Each offering period includes four consecutive six-month purchase periods. Eligible employees may purchase common stock at a price equal to 85% of the lower of the fair market value of the common stock (i) at the beginning of the offering period or (ii) at the end of the purchase period, whichever is lower, with the option price at the beginning of the first offering period equal to 85% of the initial public offering price. Participation is limited to 10% of the employee’s eligible compensation, not to exceed $25,000 per calendar year or amounts allowed by the Internal Revenue Code. On January 1 of each year, commencing with January 1, 2001, the aggregate number of shares of common stock available for purchase under the 2000 Employee Stock Purchase Plan will automatically increase by the number of shares necessary to cause the total number of shares then available for purchase to be 187,500 shares. During the years ended December 31, 2004, 2003 and 2002, Avici sold 56,708, 50,962 and 61,460 shares, respectively, to employees under the 2000 Employee Stock Purchase Plan.

On December 5, 2001, the Board of Directors enacted a stockholder rights agreement and declared a dividend of one preferred share purchase right for each outstanding share of common stock outstanding at the close of business on December 17, 2001 to the stockholders of record on that date. Each stockholder of record as of December 17, 2001 received a summary of the rights and any new stock certificates issued after the record date contain a legend describing the rights. Each preferred share purchase right entitles the registered holder to purchase from Avici one two-hundred fiftieth of a share of Series A Junior Participating Preferred Stock, par value $0.01 per share, at a price of $40.00 per one two-hundred fiftieth of a Preferred Share, subject to adjustment, upon the occurrence of certain triggering events, including the purchase of 15% or more of Avici’s outstanding common stock by a third party. Until a triggering event occurs, the common stockholders have no right to purchase shares under the stockholder rights agreement. If the right to purchase the preferred stock is triggered, the common stockholders will have the ability to purchase sufficient stock to significantly dilute the 15% or greater holder.

Avici accounts for income taxes in accordance with SFAS No. 109, Accounting for Income Taxes. Under SFAS No. 109, deferred tax assets or liabilities are computed based on the difference between the financial statement and income tax basis of assets and liabilities using currently enacted tax rates. Deferred income tax expense or credits are based on changes in the asset or liability from period to period.

As Avici has incurred net operating losses since inception, no provision for federal or state income taxes has been recorded. As of December 31, 2004, Avici had net operating loss carryforwards for federal and state income

tax purposes and tax credit carryforwards of approximately $334.2 million and $10.0 million, respectively. Approximately $18.4 million of Avici’s net operating loss carryforwards relate to deductions associated with Avici’s stock option plans, which will be benefited through stockholders’ equity if realized. The federal net operating loss carryforwards expire beginning in 2012 through 2024, and are subject to review and possible adjustment by the Internal Revenue Service (IRS). The utilization of the net operating loss carryforwards may be subject to annual limitations as a result of changes in the ownership of the Company.

The approximate income tax effects of each type of temporary differences and carryforwards are as follows:

Due to the uncertainty surrounding the realization of the deferred tax assets, Avici has provided a full valuation allowance against these amounts at December 31, 2004 and 2003.

Avici has a 401(k) Plan that provides for eligible employees to make contributions on a tax-deferred basis. All employees on the first day of the month following their date of employment are eligible to participate in the 401(k) Plan. Contributions are limited to 15% of their annual compensation, as defined, subject to certain IRS limitations. Avici may contribute to the Plan at its discretion. No employer contributions were made for all periods presented.

Future minimum payments due under lease agreements at December 31, 2004 are as follows:

Rent expense from operating leases included in the accompanying consolidated statements of operations was approximately $1.2 million, $1.3 million and $1.8 million for the years ended December 31, 2004, 2003 and 2002 respectively. In connection with its facilities leases, Avici provided letters of credit to the lessor. The letters of credit are fully collateralized by cash of $0.2 million and $0.4 million as of December 31, 2004 and 2003 respectively, and are recorded as restricted cash in the accompanying consolidated balance sheets.

Avici outsources the manufacture and assembly of its products. During the normal course of business, in order to maintain competitive lead times for customers and adequate components supply, Avici enters into agreements with certain suppliers to procure inventory based upon criteria as defined by Avici. As of December 31, 2004, Avici is committed to purchase approximately $5.3 million of inventory over the next 12 months.

The Financial Accounting Standards Board issued Interpretation No. 45 (FIN 45), “Guarantor’s Accounting and Disclosure Requirements for Guarantees, Including Indirect Guarantees of Indebtedness of Others,” requires certain guarantees to be recorded at fair value as opposed to the current practice of recording a liability only when a loss is probable and reasonably estimable and also requires a guarantor to make significant new guaranty disclosures, even when the likelihood of making any payments under the guarantee is remote. The following is a summary of agreements that Avici has determined to be within the scope of FIN 45.

In the normal course of business, Avici may agree to indemnify other parties, including customers, lessors and parties to other transactions with Avici, with respect to certain matters. Avici has agreed to hold these other parties harmless against losses arising from a breach of representations or covenants, or other claims made against certain parties. Historically, payments made by Avici, if any, under these agreements have not had a material impact on Avici’s operating results or financial position.

Avici establishes warranty reserves for costs expected to be incurred after the sale and delivery of product for deficiencies as required under specific product warranty provisions. The warranty reserves are determined based on the actual trend of historical charges incurred over the prior twelve-month period excluding any significant or infrequent issues, which are specifically identified and reserved for. The warranty liability is established when it is probable that customers will make claims and when a reasonable estimate of costs can be made. Warranty reserves are included in accrued other in the accompanying consolidated balance sheets.

and directors of Avici. The lawsuits alleged violations of the federal securities laws and were docketed in the U.S. District Court for the Southern District of New York (the “Court”) as: Felzen, et al. v. Avici Systems Inc., et al., C.A. No. 01-CV-3363; Lefkowitz, et al. v. Avici Systems Inc., et al., C.A. No. 01-CV-3541; Lewis, et al. v. Avici Systems Inc., et al., C.A. No. 01-CV-3698; Mandel, et. al v. Avici Systems Inc., et al., C.A. No. 01-CV-3713; Minai, et al. v. Avici Systems Inc., et al., C.A. No. 01-CV-3870; Steinberg, et al. v. Avici Systems Inc., et al., C.A. No. 01-CV-3983; Pelissier, et al. v. Avici Systems Inc., et al., C.A. No. 01-CV-4204; Esther, et al. v. Avici Systems Inc., et al., C.A. No. 01-CV-4352; Zhous, et al. v. Avici Systems Inc. et al., C.A. No. 01-CV-4494; Mammen, et al. v. Avici Systems Inc., et. al., C.A. No. 01-CV-5722; Lin, et al. v. Avici Systems Inc., et al., C.A. No. 01-CV-5674; and Shives, et al. v. Banc of America Securities, et al., C.A. No. 01-CV-4956. On April 19, 2002, a consolidated amended class action complaint (the “Complaint”), which superseded these twelve purported securities class action lawsuits, was filed in the Court. The Complaint is captioned “In re Avici Systems, Inc. Initial Public Offering Securities Litigation” (21 MC 92, 01 Civ. 3363 (SAS)) and names as defendants Avici, certain of the underwriters of Avici’s initial public offering, and certain of Avici’s officers and directors. The Complaint, which seeks unspecified damages, alleges violations of the federal securities laws, including among other things, that the underwriters of Avici’s initial public offering (“IPO”) improperly required their customers to pay the underwriters excessive commissions and to agree to buy additional shares of Avici’s stock in the aftermarket as conditions of receiving shares in Avici’s IPO. The Complaint further claims that these supposed practices of the underwriters should have been disclosed in Avici’s IPO prospectus and registration statement. In addition to the Complaint against Avici, various other plaintiffs have filed other substantially similar class action cases against approximately 300 other publicly traded companies and their IPO underwriters in New York City, which along with the case against Avici have all been transferred to a single federal district judge for purposes of case management. Avici and its officers and directors believe that the claims against Avici lack merit, and have defended the litigation vigorously. In that regard, on July 15, 2002, Avici, together with the other issuers named as defendants in these coordinated proceedings, filed a collective motion to dismiss the consolidated amended complaints against them on various legal grounds common to all or most of the issuer defendants.

however, the monetary obligations to the class members under the proposed settlement will be satisfied. In addition, Avici and any other participating issuer defendants will be required to assign to the class members certain claims that they may have against the underwriters of their IPOs.

The Securities and Exchange Commission (the “SEC”) is conducting several investigations relating to Qwest Communications International Inc. (“Qwest”) and its business relationships. In the SEC investigation entitled “Issuers Related to Qwest,” Avici understands that it is one of eleven companies whose business dealings with Qwest are being investigated. Avici has cooperated with these investigations and there has been no wrong-doing by Avici alleged in any of these investigations. How long these investigations may continue and their ultimate outcome cannot be determined.

Avici, under the supervision and with the participation of Avici’s management, including the principal executive officer and principal financial officer, evaluated the effectiveness of Avici’s disclosure controls and procedures as of the end of the period covered by this annual report (the “Evaluation Date”) pursuant to Rule 13a-15(b) and 15d-15(b) promulgated under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Based on this evaluation, Avici’s principal executive officer and principal financial officer have concluded, that, as of the Evaluation Date, Avici’s disclosure controls and procedures effectively ensure that information required to be disclosed in our filings and submissions under the Exchange Act is recorded, processed, summarized, and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms, including ensuring that such information is accumulated and communicated to Avici’s management, including Avici’s principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure.

The Company has continued to make enhancements to its internal controls over financial reporting to meet its compliance requirements pursuant to Section 404 of Sarbanes-Oxley.

There were no changes in Avici’s internal control over financial reporting during Avici’s last fiscal quarter that have materially affected, or are reasonably likely to materially affect Avici’s internal control over financial reporting.

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13a-15(f) and 15(d)-15(f). Under the supervision and with the participation of our management, including our Chief Executive Officer and Chief Financial Officer, we conducted an evaluation of the effectiveness of our internal control over financial reporting based on the framework in “Internal Control—Integrated Framework” issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on our evaluation under the framework in “Internal Control—Integrated Framework”, our management concluded that our internal control over financial reporting was effective as of December 31, 2004.

Management’s assessment of the effectiveness of our internal control over financial reporting as of December 31, 2004 has been audited by Ernst & Young LLP, an independent registered public accounting firm, as stated in their report which is included in this item 9A under the heading “Report of Independent Registered Public Accounting Firm.”

We have audited management’s assessment, included in the accompanying Management’s Report on Internal Control Over Financial Reporting, that Avici Systems Inc. maintained effective internal control over financial reporting as of December 31, 2004, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (the COSO criteria). Avici Systems Inc.’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting. Our responsibility is to express an opinion on management’s assessment and an opinion on the effectiveness of the company’s internal control over financial reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, evaluating management’s assessment, testing and evaluating the design and operating effectiveness of internal control, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In our opinion, management’s assessment that Avici Systems Inc. maintained effective internal control over financial reporting as of December 31, 2004, is fairly stated, in all material respects, based on the COSO criteria. Also, in our opinion, Avici Systems Inc. maintained, in all material respects, effective internal control over financial reporting as of December 31, 2004, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets as of December 31, 2004 and 2003, and the related consolidated statements of operations, shareholders’ equity, and cash flows for each of the three years in the period ended December 31, 2004 of Avici Systems Inc. and our report dated March 7, 2005 expressed an unqualified opinion thereon.

The information required by this Item 10 is incorporated herein by reference to our Definitive Proxy Statement with respect to our 2005 Annual Meeting of Stockholders to be filed with the Securities and Exchange Commission not later than 120 days after the end of the fiscal year ended December 31, 2004.

The information required by this Item 11 is incorporated herein by reference to our Definitive Proxy Statement with respect to our 2005 Annual Meeting of Stockholders to be filed with the Securities and Exchange Commission not later than 120 days after the end of the fiscal year ended December 31, 2004.

The information required by this Item 12 is incorporated herein by reference to our Definitive Proxy Statement with respect to our 2005 Annual Meeting of Stockholders to be filed with the Securities and Exchange Commission not later than 120 days after the end of the fiscal year ended December 31, 2004, under the heading of “Ownership of Management and Directors” and “Equity Compensation Plan Information.”

The information required by this Item 13 is incorporated herein by reference to our Definitive Proxy Statement with respect to our 2005 Annual Meeting of Stockholders to be filed with the Securities and Exchange Commission not later than 120 days after the end of the fiscal year ended December 31, 2004.

The information required by this Item 14 is incorporated herein by reference to our Definitive Proxy Statement with respect to our 2005 Annual Meeting of Stockholders to be filed with the Securities and Exchange Commission no later than 120 days after the end of the fiscal year ended December 31, 2004.

1. All Financial Statements. (see “Consolidated Financial Statements and Supplementary Data” at Item 8 and incorporated herein by reference).

2. Financial Statement Schedules. (see “Schedule II – Valuation and Qualifying Accounts,” which is included herein by reference)

The following exhibits are filed as part of and incorporated by reference into this Form 10-K:

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.


AVICI SYSTEMS INC.

By:		/s/ PAUL F. BRAUNEIS
		Paul F. Brauneis Chief Financial Officer, Treasurer and Senior Vice President of Administration

We, the undersigned officers and directors of Avici Systems Inc., hereby severally constitute and appoint Paul F. Brauneis, our true and lawful attorney, with full power to him, to sign for us in our names in the capacities indicated below, any amendments to this Annual Report on Form 10-K (including post-effective amendments), and to file the same, with all exhibits thereto and other documents in connection therewith, with the Securities and Exchange Commission, and generally to do all things in our names and on our behalf in our capacities as officers and directors to enable Avici Systems Inc., to comply with the provisions of the Securities Act of 1933, as amended, hereby ratifying and confirming our signatures as they may be signed by our said attorneys, or any of them, to said Annual Report and all amendments thereto.

Pursuant to the requirements of the Securities Act of 1933, this Annual Report on Form 10-K has been signed by the following persons in the capacities and on the date indicated.


PART I		3
ITEM 1.	BUSINESS	3
ITEM 2.	PROPERTIES	11
ITEM 3.	LEGAL PROCEEDINGS	11
ITEM 4.	SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS	13

PART II		14
ITEM 5.	MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES	14
ITEM 6.	SELECTED CONSOLIDATED FINANCIAL DATA	15
ITEM 7.	MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS	16
ITEM 7A.	QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK	36
ITEM 8.	CONSOLIDATED FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA	37
ITEM 9.	CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE	58
ITEM 9A.	CONTROLS AND PROCEDURES	58

PART III		60
ITEM 10.	DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT	60
ITEM 11.	EXECUTIVE COMPENSATION	60
ITEM 12.	SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS	60
ITEM 13.	CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS	60
ITEM 14.	PRINCIPAL ACCOUNTANT FEES AND SERVICES	60
ITEM 15.	EXHIBITS AND FINANCIAL STATEMENT SCHEDULES	60

SIGNATURES		64


	High		Low
Fiscal 2004
First Quarter	$	24.38	$	7.49
Second Quarter	$	15.50	$	9.22
Third Quarter	$	12.91	$	6.11
Fourth Quarter	$	9.35	$	5.87
Fiscal 2003
First Quarter	$	3.97	$	3.45
Second Quarter	$	6.98	$	3.47
Third Quarter	$	7.32	$	5.30
Fourth Quarter	$	8.73	$	5.56


	Year Ended December 31,
	2004			2003			2002			2001			2000
	(in thousands, except share and per share data)
Statement of Operations Data:
Gross revenue:
Product revenue	$	21,150		$	35,135		$	29,388		$	52,868		$	15,775
Service revenue		5,450			4,281			3,756			3,775			112

Gross revenue		26,600			39,416			33,144			56,643			15,887
Common stock warrant discount—Product		(2,108	)		(2,451	)		(3,266	)		(3,267	)		(817	)

Net revenue		24,492			36,965			29,878			53,376			15,070
Cost of revenue—Product		9,814			11,606			15,133			50,223			11,157
Cost of revenue—Service		2,269			3,053			2,272			2,721			789

Gross margin		12,409			22,306			12,473			432			3,124
Operating expenses:
Research and development		32,425			46,483			55,844			61,527			54,055
Sales and marketing		10,805			10,863			13,462			18,848			11,928
General and administrative		5,718			6,077			7,178			9,538			4,771
Stock-based compensation		309			1,022			4,111			15,003			18,659
Restructuring charges		—			—			925			1,061			—
Common stock warrant expense		—			—			—			—			2,400
Purchased in-process research and development		—			—			—			—			4,000

Total operating expenses		49,257			64,445			81,520			105,977			95,813

Loss from operations		(36,848	)		(42,139	)		(69,047	)		(105,545	)		(92,689	)
Interest income		1,423			2,181			4,201			10,698			8,735
Interest expense		—			(30	)		(161	)		(645	)		(733	)
Other income, net *		—			2,957			227			—			—

Net loss	$	(35,425	)	$	(37,031	)	$	(64,780	)	$	(95,492	)	$	(84,687	)

Basic and diluted net loss per share	$	(2.81	)	$	(3.02	)	$	(5.20	)	$	(7.75	)	$	(14.77	)

Weighted average common basic and diluted shares		12,628,408			12,248,606			12,456,221			12,314,577			5,734,596

Pro forma basic and diluted net loss per share (unaudited)														(8.11	)

Pro forma weighted average common basic and diluted shares (unaudited)														10,440,934


	As of December 31,
	2004		2003		2002		2001		2000
	( in thousands )
Balance Sheet Data:
Cash, cash equivalents and marketable securities	$	69,026	$	95,930	$	125,089	$	164,441	$	254,931
Working capital		50,116		56,821		64,725		116,672		225,340
Total assets		94,413		116,046		158,154		220,277		302,088
Long-term obligations, less current portion		—		—		46		753		3,072
Total stockholders’ equity		76,270		100,227		134,897		193,687		267,878


Fiscal Year	Operating Leases		Inventory Purchase Commitment		Total
2005	$	1,126	$	5,288	$	6,414
2006		1,115		—		1,115
2007		743		—		743
Thereafter		—		—		—

Total future contractual commitments	$	2,984	$	5,288	$	8,272


Period	Total Number of Shares Purchased (1)	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Approximate Dollar Value that May Yet Be Purchased Under the Plans or Programs
October 2004	2,482	$	6.53	—	—
November 2004	—		—	—	—
December 2004	—		—	—	—

Total	2,482	$	6.53	—	—


	Carrying Value at December 31, 2004 (in thousands)
	Maturing in
	2005			2006			Grand total
Cash and Cash Equivalents	$	22,638		$	—		$	22,638
Weighted Average Interest Rate		2.11	%		—			2.11	%
Marketable Securities	$	32,893		$	13,495		$	46,388
Weighted Average Interest Rate		1.91	%		2.39	%		2.05	%
Total Portfolio	$	55,531		$	13,495		$	69,026
Weighted Average Interest Rate		1.99	%		2.39	%		2.07	%


		Page
Report of Ernst & Young LLP, Independent Registered Public Accounting Firm		38

Consolidated Balance Sheets		39

Consolidated Statements of Operations		40

Consolidated Statements of Stockholders’ Equity		41

Consolidated Statements of Cash Flows		42

Notes to Consolidated Financial Statements		43


	December 31,
	2004			2003
	(in thousands, except share and per share amounts)
ASSETS
Current Assets:
Cash and cash equivalents	$	22,638		$	22,374
Marketable securities		32,893			41,240
Trade accounts receivable, net of allowance of $145 in 2004 and $245 in 2003		4,243			6,620
Inventories		7,020			1,206
Prepaid expenses and other current assets		1,465			1,200

Total current assets		68,259			72,640

Property and equipment, at cost:
Computer equipment		41,499			38,667
Laboratory and test equipment		43,039			39,042
Leasehold improvements		4,329			4,304
Furniture and fixtures		1,063			1,063

		89,930			83,076
Less—Accumulated depreciation and amortization		81,728			72,418

Net property and equipment		8,202			10,658
Other Assets:
Marketable securities		13,495			32,316
Contract distribution rights		4,214			—
Restricted cash		243			432

Total other assets		17,952			32,748

	$	94,413		$	116,046

LIABILITIES AND STOCKHOLDERS’ EQUITY
Current Liabilities:
Current maturities of capital lease obligations	$	—		$	46
Accounts payable		7,027			5,539
Accrued payroll and payroll-related costs		1,899			3,869
Accrued restructuring costs		—			412
Accrued other		1,870			3,264
Deferred revenue		7,347			2,689

Total current liabilities		18,143			15,819
Commitments and contingencies
Stockholders’ Equity:
Preferred stock, $0.01 par value— Authorized 5,000,000 shares Issued and outstanding – none		—			—
Common stock, $0.0001 par value— Authorized—250,000,000 shares Issued and outstanding—13,439,016 shares at December 31, 2004 and 12,715,941 shares at December 31, 2003		1			1
Additional paid-in capital		461,830			458,567
Common stock warrants		18,521			12,200
Subscriptions receivable		—			(2,500	)
Treasury stock, at cost—489,754 shares at December 31, 2004 and 482,308 shares at December 31, 2003		(2,187	)		(2,108	)
Deferred compensation		(852	)		(315	)
Accumulated deficit		(401,043	)		(365,618	)

Total stockholders’ equity		76,270			100,227

	$	94,413		$	116,046


	Years Ended December 31,
	2004			2003			2002
	(in thousands, except share and per share amounts)
Revenue:
Product	$	21,150		$	35,135		$	29,388
Service		5,450			4,281			3,756

Total gross revenue		26,600			39,416			33,144
Common Stock Warrant Discount—Product		(2,108	)		(2,451	)		(3,266	)

Net revenue		24,492			36,965			29,878
Cost of Revenue—Product (1)		9,814			11,606			15,133
Cost of Revenue—Service		2,269			3,053			2,272

Gross margin		12,409			22,306			12,473

Operating Expenses:
Research and development (2)		32,425			46,483			55,844
Sales and marketing (2)		10,805			10,863			13,462
General and administrative (2)		5,718			6,077			7,178
Stock-based compensation		309			1,022			4,111
Restructuring charges		—			—			925

Total operating expenses		49,257			64,445			81,520

Loss from operations		(36,848	)		(42,139	)		(69,047	)
Interest Income		1,423			2,181			4,201
Interest Expense		—			(30	)		(161	)
Other Income		—			2,957			227

Net loss	$	(35,425	)	$	(37,031	)	$	(64,780	)

Net Loss per Share:
Basic and diluted	$	(2.81	)	$	(3.02	)	$	(5.20	)

Weighted Average Shares Used in Computing Net Loss per Share:
Basic and diluted		12,628,408			12,248,606			12,456,221

(1) Includes credits related to inventory charge recorded in 2001	$	(773	)	$	(1,910	)	$	(2,468	)

(2) Excludes certain noncash, stock-based compensation, as follows:
Research and development	$	222		$	668		$	2,507
Sales and marketing		42			181			762
General and administrative		45			173			842

	$	309		$	1,022		$	4,111


	Common Stock					Additional Paid-in Capital			Common Stock Warrants		Subscriptions Receivable			Treasury Stock					Deferred Compensation and Other Consideration			Accumulated Deficit			Total Stockholders’ Equity
	Number of Shares		$0.0001 Par Value			Additional Paid-in Capital			Common Stock Warrants		Subscriptions Receivable			Shares		Amount			Deferred Compensation and Other Consideration			Accumulated Deficit			Total Stockholders’ Equity
	(in thousands)
Balance, December 31, 2001	50,289			5			462,961			12,200		(2,500	)	—			—			(15,172	)		(263,807	)		193,687
Amortization relating to warrants																				3,266						3,266
Issuance of stock relating to Employee Stock Purchase Plan	172						275																			275
Exercise of common stock options	52						38																			38
Forfeiture of stock options due to employee terminations							(4,549	)												3,530						(1,019	)
Amortization of deferred compensation																				4,111						4,111
Purchase of treasury stock, at cost														(409	)		(681	)								(681	)
Forfeiture of restricted stock	(59	)																								—
One-for-four reverse stock split	(37,824	)		(4	)		4							218												—
Net loss																							(64,780	)		(64,780	)

Balance, December 31, 2002	12,630			1			458,729			12,200		(2,500	)	(191	)		(681	)		(4,265	)		(328,587	)		134,897
Amortization relating to warrants																				2,451						2,451
Issuance of stock relating to Employee Stock Purchase Plan	51						171																			171
Exercise of common stock options	46						166																			166
Forfeiture of stock options due to employee terminations							(499	)												477						(22	)
Amortization of deferred compensation																				1,022						1,022
Purchase of treasury stock, at cost														(291	)		(1,427	)								(1,427	)
Forfeiture of restricted stock	(11	)																								—
Net loss																							(37,031	)		(37,031	)

Balance, December 31, 2003	12,716		$	1		$	458,567		$	12,200	$	(2,500	)	(482	)	$	(2,108	)	$	(315	)	$	(365,618	)	$	100,227
Issuance of common stock warrants to a customer										6,321																6,321
Issuance of stock relating to Employee Stock Purchase Plan	57						222																			222
Issuance of restricted stock to employees	155						1,805													(1,805	)					—
Exercise of common stock options	566						3,895																			3,895
Forfeiture of stock options due to employee terminations							(43	)												5						(38	)
Amortization of deferred compensation																				930						930
Purchase of treasury stock, at cost														(8	)		(79	)								(79	)
Forfeiture and retirement of restricted stock	(55	)					(2,833	)				2,500								333						—
Compensation expense relating to stock option modification							217																			217
Net loss																							(35,425	)		(35,425	)

Balance, December 31, 2004	13,439		$	1		$	461,830		$	18,521	$	—		(490	)	$	(2,187	)	$	(852	)	$	(401,043	)	$	76,270


	For the Years Ended December 31,
	2004			2003			2002
	(in thousands)
Cash flows from operating activities:
Net loss	$	(35,425	)	$	(37,031	)	$	(64,780	)
Adjustments to reconcile net loss to net cash used in operating activities—
Depreciation and amortization		9,310			22,249			24,080
Gain on disposal of property and equipment		—			—			(193	)
Compensation expense associated with issuance of stock-based awards to employees and consultants		1,109			1,022			3,092
Amortization of common stock warrant discount—product		2,108			2,451			3,266
Changes in current assets and liabilities—
Trade accounts receivable		2,377			(4,027	)		238
Inventories		(5,814	)		(59	)		6,962
Prepaid expenses and other current assets		(265	)		164			1,270
Accounts payable		1,488			1,055			(1,417	)
Accrued payroll and payroll related		(1,970	)		979			(61	)
Accrued restructuring costs		(412	)		(850	)		690
Accrued other		(1,395	)		(653	)		(1,946	)
Deferred revenue		4,658			(7,284	)		1,719

Net cash used in operating activities		(24,231	)		(21,984	)		(27,080	)

Cash flows from investing activities:
Proceeds from the maturity of marketable securities		47,810			88,320			208,978
Purchases of marketable securities		(20,642	)		(65,494	)		(206,302	)
Purchases of property and equipment		(6,854	)		(5,469	)		(9,963	)
Proceeds from sale of property and equipment		—			—			366
Proceeds from restricted cash		189			91			11

Net cash provided by (used in) investing activities		20,503			17,448			(6,910	)

Cash flows from financing activities:
Payments on capital lease obligations		(46	)		(707	)		(2,318	)
Repurchase of common stock		(79	)		(1,427	)		(681	)
Proceeds from sales of common stock, net of issuance costs		222			171			313
Proceeds from exercise of stock options		3,895			166			—

Net cash (used in) provided by financing activities		3,992			(1,797	)		(2,686	)

Net increase (decrease) in cash and cash equivalents		264			(6,333	)		(36,676	)
Cash and cash equivalents, beginning of year		22,374			28,707			65,383

Cash and cash equivalents, end of year	$	22,638		$	22,374		$	28,707

Supplemental disclosure of cash flow information:
Cash paid during the year for interest	$	—		$	30		$	161


Held to Maturity Securities	Remaining Maturities	Amortized Cost		Fair Market Value		Unrealized Gain (Loss)
Commercial Paper	Within 1 year	$	4,100	$	4,048	$	(52	)
U.S. Government Obligations	1 – 2 years		11,500		11,397		(103	)
U.S. Government Obligations	With in 1 year		21,054		20,942		(112	)
Corporate Bonds	1 – 2 years		1,995		1,977		(18	)
Corporate Bonds	With in 1 year		7,739		7,312		(427	)

Total marketable securities			46,388		45,676		(712	)
Cash and cash equivalents			22,638		22,638		—

Total cash, cash equivalents and marketable securities		$	69,026	$	68,314	$	(712	)


Asset Classification		Estimated Useful Life
Computer equipment		3 years
Laboratory and test equipment		2-3 years
Leasehold improvements		3 years
Furniture and fixtures		5 years


	Number of Shares		Range of Exercise Prices		Weighted Average Exercise Price
Outstanding, December 31, 2001	1,351,803		$	0.40-353.52	$	26.12
Granted	2,151,317			2.44-12.00		7.56
Exercised	(10,177	)		0.40-8.15		2.83
Forfeited—Cancelled	(562,309	)		0.40-353.50		23.67

Outstanding, December 31, 2002	2,930,634			0.40-128.00		12.92
Granted	1,096,550			3.49-8.35		3.894
Exercised	(45,700	)		0.40-8.00		5.084
Forfeited—Cancelled	(679,572	)		2.44-105.00		14.10

Outstanding, December 31, 2003	3,301,912			0.40-128.00		9.792
Granted	538,700			6.41-22.10		11.493
Exercised	(561,358	)		0.40-20.68		6.814
Forfeited—Cancelled	(438,987	)		3.32-100.00		12.58

Outstanding, December 31, 2004	2,840,267		$	0.40-128.00	$	10.261

Exercisable, December 31, 2004	1,679,348				$	11.82

Exercisable, December 31, 2003	1,658,681				$	12.74

Exercisable, December 31, 2002	1,256,523				$	15.45


		Options Outstanding				Exercisable
Exercise Price		Number of Shares Outstanding at December 31, 2004	Weighted Average Remaining Contractual Life (in years)	Weighted Average Exercise Price		Number of Shares	Weighted Average Exercise Price
$	0.40	1,492	2.7	$	0.40	1,492	$	0.40
	2.00-2.76	8,585	5.3		2.25	5,699		2.08
	3.49-4.64	621,271	7.9		3.64	232,941		3.67
	5.40-8.00	1,263,699	6.0		7.57	970,702		7.62
	8.15-12.00	412,040	9.0		10.48	74,024		10.77
	13.32-18.84	384,861	6.3		15.75	258,068		16.22
	20.68-29.80	39,393	6.8		23.55	30,027		23.76
	32.00-48.00	55,626	3.7		35.54	53,887		35.56
	54.80-79.25	40,300	5.4		66.02	39,550		66.22
	100.00-128.00	13,000	5.6		104.31	12,958		104.23

$	0.40-128.00	2,840,267	6.8	$	10.26	1,679,348	$	11.82


	Operating Leases
2005		1,126
2006		1,115
2007		743

Total payments	$	2,984


	2004
Product warranty liability, beginning of year	$	1,116
Warranties issued during the period		1,112
Settlements made during the period		(1,659	)

Product warranty liability, end of year	$	569


	March 31, 2004			June 30, 2004			September 30, 2004			December 31, 2004
Gross revenue—product	$	5,820		$	10,423		$	2,454		$	2,453
Gross revenue—service		1,134			1,674			1,256			1,386
Common stock warrant discount—product		(527	)		(527	)		(527	)		(527	)

Net revenue	$	6,427		$	11,570		$	3,183		$	3,312

Gross margin—product	$	3,237		$	4,855		$	308		$	828
Gross margin—service		540			1,112			687			842

Gross margin—total	$	3,777		$	5,967		$	995		$	1,670

Net loss	$	(9,078	)	$	(6,268	)	$	(10,372	)	$	(9,707	)

Basic and diluted net loss per share	$	(0.73	)	$	(0.50	)	$	(0.82	)	$	(0.76	)


	March 31, 2003			June 30, 2003			September 30, 2003			December 31, 2003
Gross revenue—product	$	6,663		$	8,827		$	9,353		$	10,292
Gross revenue—service		927			1,020			1,108			1,226
Common stock warrant discount—product		(817	)		(817	)		(817	)		—

Net revenue	$	6,773		$	9,030		$	9,644		$	11,518

Gross margin—product	$	2,585		$	5,111		$	6,058		$	7,324
Gross margin—service		165			283			289			491

Gross margin—total	$	2,750		$	5,394		$	6,347		$	7,815

Net loss	$	(12,700	)	$	(11,313	)	$	(9,111	)	$	(3,907	)

Basic and diluted net loss per share	$	(1.03	)	$	(0.92	)	$	(0.75	)	$	(0.32	)


Exhibit Number		Description of Document

3.1		Fourth Amended and Restated Certificate of Incorporation (previously filed as Exhibit 3.2 to our Registration Statement on Form S-1 (File No. 333-37316), which is incorporated herein by reference)

3.2		Certificate of Amendment of Fourth Restated Certificate of Incorporation of the Registrant (previously filed as Exhibit 3.2 to our Form 10-K for the year ended December 31, 2002 filed with the Commission on March 28, 2003 (File No. 000-30865), which is incorporated herein by reference)

3.3		Certificate of Designation of Series A Junior Participating Preferred Stock of the Registrant (previously filed as Exhibit 3.3 to our Form 10-K for the year ended December 31, 2002 filed with the Commission on March 28, 2003 (File No. 000-30865), which is incorporated herein by reference)

3.4		Certificate of Amendment of Certificate of Designation of Series A Junior Participating Preferred Stock of the Registrant (previously filed as Exhibit 3.4 to our Form 10-K for the year ended December 31, 2002 filed with the Commission on March 28, 2003 (File No. 000-30865), which is incorporated herein by reference)

3.5		Amended and Restated By-Laws of the Registrant (previously filed as Exhibit 3.4 to our Registration Statement on Form S-1 (File No. 333-37316), which is incorporated herein by reference)

4.1		Specimen certificate representing the Registrant’s Common Stock (previously filed as Exhibit 4.1 to our Form 10-K for the year ended December 31, 2002 filed with the Commission on March 28, 2003 (File No. 000-30865), which is incorporated herein by reference)

4.2		Common Stock Purchase Warrant, dated as of January 7, 2004, issued to Nortel Networks Limited by Avici Systems Inc. (previously filed as Exhibit 4.1 to our Form 8-K filed with the Commission on January 8, 2004 (File No. 000-30865), which is incorporated herein by reference)

10.1*		1997 Stock Incentive Plan (previously filed as Exhibit 10.1 to our Registration Statement on Form S-1 (File No. 333-37316), which is incorporated herein by reference)

10.2*		Amended 2000 Stock Option and Incentive Plan, as amended (previously filed as Exhibit 4.3 to our Registration Statement on Form S-8 (File No. 333-116179), which is incorporated herein by reference)

10.3*		2000 Employee Stock Purchase Plan, as amended on December 20, 2000 (previously filed as Exhibit 10.3 to our Form 10-K for the year ended December 31, 2001 filed with the Commission on March 22, 2002 (File No. 000-30865), which is incorporated herein by reference)

10.4*		2000 Non-Employee Director Stock Option Plan, as amended (previously filed as Exhibit 4.1 to our Registration Statement on Form S-8 (File No. 333-116179), which is incorporated herein by reference)

10.5		Fifth Amended and Restated Investor Rights Agreement, by and among the registrant and the Investors and Founders listed therein, dated as of April 24, 2000, as amended (previously filed as Exhibit 10.5 to our Registration Statement on Form S-1 (File No. 333-37316), which is incorporated herein by reference)

10.6		Omnibus Agreement, dated August 26, 1999, between the Registrant and Nortel Networks Inc. (previously filed as Exhibit 10.6 to our Registration Statement on Form S-1 (File No. 333-37316), which is incorporated herein by reference)

10.7		Lease, dated June 2, 1998, between the Registrant and Y-CEE Investment Trust, as amended (previously filed as Exhibit 10.7 to our Registration Statement on Form S-1 (File No. 333-37316), which is incorporated herein by reference)

10.8		EMC Module Supply Agreement, dated May 1999, between the Registrant and Nortel Networks Inc. (previously filed as Exhibit 10.8 to our Registration Statement on Form S-1 (File No. 333-37316), which is incorporated herein by reference)


Exhibit Number		Description of Document

10.9†		Procurement Agreement, dated May 17, 2000, between the Registrant and Williams Communications, Inc. (previously filed as Exhibit 10.9 to our Registration Statement on Form S-1 (File No. 333-37316), which is incorporated herein by reference)

10.10*		Offer letter, dated January 13, 2000, from the Registrant to Paul F. Brauneis (previously filed as Exhibit 10.11 to our Registration Statement on Form S-1 (File No. 333-37316), which is incorporated herein by reference)

10.11		Lease, dated June 8, 2000, between the Registrant and Yvon Cormier, Trustee of Y-C Investment Trust V (previously filed as Exhibit 10.12 to our Registration Statement on Form S-1 (File No. 333-37316), which is incorporated herein by reference)

10.12*		Offer letter, dated July 27, 2000 between the Registrant and Steven B. Kaufman (previously filed as Exhibit 10.1 to our Form 10-Q for the quarterly period ended September 30, 2000 filed with the Commission on November 13, 2000 (File No. 000-30865), which is incorporated herein by reference)

10.13		Lease, dated August 2, 2000, between the Registrant and Y-CEE Investment Trust (previously filed as Exhibit 10.2 to our Form 10-Q for the quarterly period ended September 30, 2000 filed with the Commission on November 13, 2000 (File No. 000-30865), which is incorporated herein by reference)

10.14*		Offer letter, dated March 28, 2003, between the Registrant and Chris Koeneman (previously filed as Exhibit 10.1 to our Form 10-Q for the quarterly period ended March 31, 2003 filed with the Commission on May 14, 2003 (File No. 000-30865), which is incorporated herein by reference)

10.15+		OEM Purchase and Sales Agreement, dated January 7, 2004, between the Registrant and Nortel Networks Limited (previously filed as exhibit 10.15 to our form 10-K for the year ended December 31, 2003 filed with the Commission on March 12, 2004 (file No. 000-30865), which is incorporated herein by reference)

10.16+		Procurement Agreement, dated December 21, 2000, between the Registrant and AT&T Corp. (previously filed as exhibit 10.1 to our form 10-Q for the quarterly period ended September 30, 2004 filed with the Commission on November 5, 2004 (File No. 000-30865), which is incorporated herein by reference)

10.17+		Amendment No. 1, dated January 11, 2002, to Procurement Agreement between Registrant and AT&T Corp. (previously filed as exhibit 10.2 to our form 10-Q for the quarterly period ended September 30, 2004 filed with the Commission on November 5, 2004 (File No. 000-30865), which is incorporated herein by reference)

10.18+		Amendment No. 2, dated March 29, 2002, to Procurement Agreement between Registrant and AT&T Corp. (previously filed as exhibit 10.3 to our form 10-Q for the quarterly period ended September 30, 2004 filed with the Commission on November 5, 2004 (File No. 000-30865), which is incorporated herein by reference)

10.19+		Amendment No. 3, dated March 5, 2003, to Procurement Agreement between Registrant and AT&T Corp. (previously filed as exhibit 10.4 to our form 10-Q for the quarterly period ended September 30, 2004 filed with the Commission on November 5, 2004 (File No. 000-30865), which is incorporated herein by reference)

10.20+		Amendment No. 4, dated September 22, 2004, to Procurement Agreement between Registrant and AT&T Corp. (previously filed as exhibit 10.5 to our form 10-Q for the quarterly period ended September 30, 2004 filed with the Commission on November 5, 2004 (File No. 000-30865), which is incorporated herein by reference)

10.21		Separation Agreement between the Registrant and Steven Kaufman, effective December 8, 2004 (previously filed as Exhibit 10.1 to our Form 8-K filed with the Commission on December 10, 2004 (File No. 000-30865), which is incorporated herein by reference).


Exhibit Number		Description of Document

16.1		Letter from Arthur Andersen LLP to the SEC dated July 2, 2002 (previously filed as Exhibit 16.1 to our Form 8-K/A filed with the Commission on July 3, 2002 (File No. 000-30865), which is incorporated herein by reference)

21.1		Subsidiaries of Avici

23.1		Consent of Ernst & Young LLP

24.1		Power of Attorney (included as part of the signature page of this Report)

31.1		Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

31.2		Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

32.1		Certification Pursuant to 18 U.S.C. Section 1350, As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

32.2		Certification Pursuant to 18 U.S.C. Section 1350, As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002


Signature	Title	Date

/s/ SURYA R. PANDITI Surya R. Panditi	Chairman and Director	March 11, 2005

/s/ WILLIAM LEIGHTON William Leighton	Chief Executive Officer and Director (principal executive officer)	March 11, 2005

/s/ PAUL F. BRAUNEIS Paul F. Brauneis	Chief Financial Officer, Treasurer and Senior Vice President of Administration (principal financial officer and principal accounting officer)	March 11, 2005

/s/ ROBERT P. SCHECHTER Robert P. Schechter	Director	March 11, 2005

/s/ WILLIAM INGRAM William Ingram	Director	March 11, 2005

/s/ RICHARD T. LIEBHABER Richard T. Liebhaber	Director	March 11, 2005


Description	Balance at Beginning of Period		Charged to Costs and Expenses		Charged to Other Accounts		Deductions		Balance at End of Period
Accounts Receivable Reserves and Allowances
Year ended December 31, 2004	$	245	$	—	$	—	$	100	$	145

Year ended December 31, 2003	$	175	$	70	$	—	$	—	$	245

Year ended December 31, 2002	$	—	$	220	$	—	$	45	$	175