Exhibit 99.1

Sonus Networks Reports 2012 Third Quarter Results

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SBC Revenue Exceeds Expectations for Third Straight Quarter of Fiscal 2012

For Immediate Release: November 7, 2012

WESTFORD, Mass. — Sonus Networks, Inc. (Nasdaq: SONS), a global leader in SIP communications, today announced results for the third quarter ended September 28, 2012.

Results are reported on a consolidated basis and include the partial quarter financial effect of Network Equipment Technologies, Inc. (“NET”), an acquisition which closed on August 24, 2012.  A table providing stand-alone Sonus and stand-alone NET results is provided in the supplementary financial data on the IR page of the Company’s website.

Third Quarter Consolidated 2012 Highlights (including NET)

·                  Total revenue was $57.0 million.

·                  Total SBC revenue, including maintenance and services, was $25.4 million, compared to $19.1 million in the second quarter of 2012 and $13.9 million in the third quarter of 2011.

·                  SBC product revenue was $20.4 million, compared to $13.5 million in the second quarter of 2012 and $10.4 million in the third quarter of 2011.

·                  SBC product revenue was a record 61% of total product revenue.

·                  Won 40 new customers in the quarter, 11 for Sonus and 29 for NET (post-acquisition).

·                  Sonus SBC 5100 and Sonus SBC 5200 Certified in Microsoft’s Unified Communications Open Interoperability Program for Microsoft Lync Server 2010; together with Sonus SBC 1000 and Sonus SBC 2000 represents the largest portfolio of MS Lync certified SBCs on the market.

Revenue for the third quarter of fiscal 2012 was $57.0 million, compared to $57.6 million in the second quarter of fiscal 2012 and $66.4 million in the third quarter of fiscal 2011.  The GAAP net loss for the third quarter of fiscal 2012 was $15.6 million, or $0.06 per share, compared to a GAAP net loss of $11.7 million, or $0.04 per share, in the second quarter of 2012 and GAAP net income of $1.9 million, or $0.01

per diluted share, in the third quarter of fiscal 2011.  The non-GAAP net loss for the third quarter of fiscal 2012 was $6.3 million, or $0.02 per share, compared to a non-GAAP net loss of $8.6 million, or $0.03 per share, in the second quarter of fiscal 2012 and non-GAAP net income of $4.1 million, or $0.01 per diluted share, in the third quarter of fiscal 2011.

2012 Fourth Quarter and Full Year Outlook

The Company’s outlook is based on current indications for its business, which may change during the current quarter.  All figures are non-GAAP and include the partial quarter effect of NET in the third quarter of 2012 and the anticipated full quarter effect of NET in the fourth quarter of 2012.  A reconciliation of the non-GAAP to GAAP outlook and a statement on the use of non-GAAP financial measures are included at the end of this press release.

Restructuring

In August 2012, the Company initiated a plan to streamline operations and reduce operating costs, including a corporate-wide restructuring plan.  In the third quarter of fiscal 2012 the Company recorded restructuring expenses of $2.0 million for severance and related expenses and the consolidation of its France offices.  The Company expects to record additional restructuring expenses of $6.0 million in the fourth quarter of fiscal 2012, comprised of approximately $5 million for facility-related charges and $1 million for severance and other related charges.

Quote

“Sonus proved this quarter that our SBC growth engine is continuing to grow faster than the market.  We continue to compete very effectively and grow our market share,” said Ray Dolan, President and Chief Executive Officer.  “This continued momentum will enable us to more rapidly transition our business from legacy Media Gateway toward a profitable SBC growth company.”

Conference Call Details

Date: November 7, 2012

Time: 8:30 am (ET)

Dial-in number: 800 908 8402

International Callers: +1 212 231 2936

Replay information:

A telephone playback of the call will be available shortly following the conference call until November 21, 2012 and can be accessed by calling 800 633 8284 or +1 402 977 9140 for international callers.  The reservation number for the replay is 21606654.  A webcast replay of the conference call will also be available shortly following the conference call on the Company’s Investor Relations Web site in the Events & Presentations — Archived Events section.

Accounting Period:

As of the beginning of fiscal 2012, the Company began reporting its first, second and third quarters on a 4-4-5 basis, with the quarter ending on the Friday closest to the last day of each third month.  The Company’s fiscal year-end is December 31.

Tags:

Sonus Networks, Sonus, SONS, 2012 third quarter, earnings, results, IP-based network solutions, SBC, SBC 1000, SBC 2000, SBC 5100, SBC 5200, SBC 9000, session border controller, session border control, session management, SIP trunking, Cloud VoIP communications, unified communications, UC, VoIP, IP, TDM.

About Sonus Networks

Sonus helps the world’s leading communications service providers and enterprises embrace the next generation of SIP-based solutions including VoIP, video and Unified Communications through secure, reliable and scalable IP networks.  With customers around the globe and 15 years of experience transforming networks to IP, Sonus has enabled service providers to capture and retain users and both service providers and enterprises to generate significant ROI.  Sonus products include session border controllers, policy/routing servers, subscriber feature servers and media and signaling gateways.  Sonus products are supported by a global services team with experience in design, deployment and maintenance of some of the world’s largest and most complex IP networks.  For more information, visit www.sonus.net or call 1-855-GO-SONUS.

Important Information Regarding Forward-Looking Statements

The information in this release contains “forward-looking statements” within the meaning of the U.S. Private Securities Litigation Reform Act of 1995, which are subject to a number of risks and uncertainties.

All statements other than statements of historical facts contained in this report are forward-looking statements.  Without limiting the foregoing, the words “anticipates”, “believes”, “could”, “estimates”, “expects”, “intends”, “may”, “plans”, “seeks”, “projects” and other similar language, whether in the negative or affirmative, are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words.

Examples of forward-looking statements include, but are not limited to, statements regarding the following: plans, objectives, outlook, goals, strategies, future events or performance, growth in market share, trends, investments, customer growth, operational performance and costs, liquidity and financial positions, competition, estimated expenditures and investments, impacts of laws, rules and regulations, revenues and earnings, performance and other statements that are other than statements of historical facts.  Forward-looking statements are based on our current expectations and assumptions regarding our business, the economy and other future conditions.  Because forward-looking statements relate to the future, they are subject to inherent uncertainties, risks and changes in circumstances that are difficult to predict.  They are neither statements of historical fact nor guarantees or assurances of future performance.  Our actual results could differ materially from those anticipated in these forward-looking statements as a result of various factors, including, but not limited to, the timing of our recognition of revenues; our ability to recruit and retain key personnel; difficulties supporting our new strategic focus on channel sales; difficulties retaining and expanding our customer base; difficulties leveraging market opportunities; restructuring activities; our ability to realize benefits from acquisitions (including with respect to our acquisition of Network Equipment Technologies, Inc.); litigation; actions taken by significant stockholders; difficulties providing solutions that meet the needs of customers; market acceptance of our products and services; rapid technological and market change; our ability to protect our intellectual property rights; our ability to maintain partner, reseller, distribution and vendor support and supply relationships; higher risks in international operations and markets; the impact of increased competition; currency fluctuations; changes in the market price of our common stock; and/or failure or circumvention of our controls and procedures.  Important factors that could cause actual results to differ materially from those in these forward-looking statements are discussed in Part I, Item 2 “Management’s Discussion and Analysis of Financial Condition and Results of Operations”, Part I, Item 3 “Quantitative and Qualitative Disclosures About Market Risk” and Part II, Item 1A “Risk Factors” in the Company’s most recent Quarterly Report on Form 10-Q.  We undertake no obligation to publicly update any forward-looking statement, whether as a result of new information, future developments or otherwise, except as may be required by law.  We therefore caution you against relying on any of these forward-looking statements, which speak only as of the date made.

Sonus is a registered trademark of Sonus Networks, Inc.  All other company and product names may be trademarks of the respective companies with which they are associated.

Discussion of Non-GAAP Financial Measures

Sonus management uses a number of different financial measures, both GAAP and non-GAAP, in analyzing and assessing the overall performance of the business, making operating decisions, planning and forecasting future periods, and determining payments under compensation programs.  Our annual financial plan is prepared both on a GAAP and non-GAAP basis, and the non-GAAP annual financial plan is approved by our board of directors.  Continuous budgeting and forecasting for revenue and expenses are conducted on a consistent non-GAAP basis (in addition to GAAP) and actual results on a non-GAAP basis are assessed against the annual financial plan.  We consider the use of non-GAAP financial measures helpful in assessing the core performance of our continuing operations and liquidity, and when planning and forecasting future periods.  By continuing operations we mean the ongoing results of the business excluding certain costs, including, but not limited to: stock-based compensation, amortization of

intangible assets, depreciation expense related to the fair value write-up of acquired property and equipment, acquisition-related costs and restructuring.  We also consider the use of non-GAAP earnings per share helpful in assessing the organic performance of the continuing operations of our business.  By organic performance we mean performance as if we had owned an acquired business in the same period a year ago.  While our management uses these non-GAAP financial measures as a tool to enhance their understanding of certain aspects of our financial performance, our management does not consider these measures to be a substitute for, or superior to, GAAP measures.  In addition, our presentations of these measures may not be comparable to similarly titled measures used by other companies.  These non-GAAP financial measures should not be considered alternatives for, or in isolation from, the financial information prepared and presented in accordance with GAAP.

Investors are cautioned that there are material limitations associated with the use of non-GAAP financial measures as an analytical tool.  In particular, many of the adjustments to Sonus’ financial measures reflect the exclusion of items that are recurring and will be reflected in our financial results for the foreseeable future.

Stock-based compensation is different from other forms of compensation, as it is a non-cash expense.  For example, a cash salary generally has a fixed and unvarying cash cost.  In contrast, the expense associated with an equity-based award is generally unrelated to the amount of cash ultimately received by the employee, and the cost to us is based on a stock-based compensation valuation methodology and underlying assumptions that may vary over time.  We believe that excluding non-cash stock-based compensation expense from our operating results facilitates the ability of readers of our financial statements to compare our operating results to our historical results and to other companies in our industry.

We exclude the amortization of acquired intangible assets from non-GAAP expense and income measures.  These amounts are inconsistent in amount and frequency and are significantly impacted by the timing and size of acquisitions.  Although we exclude amortization of acquired intangible assets from our non-GAAP expenses, we believe that it is important for investors to understand that intangible assets contribute to revenue generation.  We believe that excluding the non-cash amortization of intangible assets facilitates the comparison of our financial results to our historical operating results and to other companies in our industry as if the acquired intangible assets had been developed internally rather than acquired, and provides meaningful information regarding our liquidity.

As part of the assessment of the assets acquired and liabilities assumed in connection with the NET acquisition, we were required to increase the aggregate fair value of acquired property and equipment by $2.0 million.  The acquired property and equipment is being depreciated over a weighted average useful life of approximately 2.5 years.  We believe that excluding the incremental depreciation expense resulting from the fair value write-up of this acquired property and equipment facilitates the comparison of our operating results to our historical results and to other companies in our industry.

We consider certain transition, integration and other acquisition-related costs to be unpredictable and dependent on a significant number of factors that may be outside of our control.  We do not consider these acquisition-related costs to be related to the organic continuing operations of the acquired business and accordingly, we believe they are generally not relevant in assessing or estimating the long-term performance of the acquired assets.  In addition, the size, complexity and/or volume of an acquisition, which often drives the magnitude of acquisition-related costs, may not be indicative of such future costs.  By excluding acquisition-related costs from our non-GAAP measures, management is able to evaluate our ability to utilize our existing assets and estimate the long-term value that acquired assets will generate for the Company.

We recorded $2.0 million of restructuring expense in the third quarter of fiscal 2012 and expect to record approximately $6 million of restructuring expense in the fourth quarter of fiscal 2012 for facilities associated with the continuing integration of NET, severance and related costs.  We believe that excluding restructuring expenses facilitates the comparison of our financial results to our historical operating results and to other companies in our industry and provides meaningful information regarding our liquidity.

We believe that providing non-GAAP information to investors, in addition to the GAAP presentation, will allow investors to view the financial results in the way management views the operating results.  We further believe that providing this information helps investors to better understand our financial performance and evaluate the efficacy of the methodology and information used by our management to evaluate and measure such performance.

For more information:

Patti Leahy

978-614-8440
pleahy@sonusnet.com

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SONUS NETWORKS, INC.

Condensed Consolidated Statements of Operations

(in thousands, except percentages and per share amounts)

(unaudited)

SONUS NETWORKS, INC.

Condensed Consolidated Statements of Operations

(in thousands, except percentages and per share amounts)

(unaudited)

SONUS NETWORKS, INC.

Condensed Consolidated Balance Sheets

(in thousands)

(unaudited)

SONUS NETWORKS, INC.

Condensed Consolidated Statements of Cash Flows

(in thousands)

(unaudited)

SONUS NETWORKS, INC.

Supplemental Information

(In thousands)

(unaudited)

The following tables provide the details of stock-based compensation and amortization of intangible assets included in the Company’s Condensed Consolidated Statements of Operations and the line items in which these amounts are reported.

SONUS NETWORKS, INC.

Statement on the Use of Non-GAAP Financial Measures and

Reconciliation of Non-GAAP to GAAP Financial Measures

(unaudited)

To supplement its condensed consolidated financial statements presented in accordance with accounting principles generally accepted in the United States (“GAAP”), the Company discloses certain non-GAAP financial measures, including Gross margin - product, Gross margin - service, Total gross profit, Total gross margin, Research and development expense, Sales and marketing expense, General and administrative expense, Operating expenses, Income (loss) from operations, Net income (loss), and Income (loss) per share.  These non-GAAP financial measures are not presented in accordance with, nor are they intended to be a substitute for, GAAP.  In addition, our presentations of these measures may not be comparable to similarly titled measures used by other companies.  These non-GAAP financial measures should not be considered alternatives for, or in isolation from, the financial information prepared and presented in accordance with GAAP.

We use a number of different financial measures, both GAAP and non-GAAP, in analyzing and assessing the overall performance of our business, making operating decisions, planning and forecasting future periods, and determining payments under compensation programs.  We consider the use of these non-GAAP financial measures helpful in assessing the core performance of our continuing operations and liquidity, and when planning and forecasting future periods.  We define continuing operations as the ongoing revenues and expenses of the business, excluding certain items.  These excluded items for the periods presented are stock-based compensation expense, amortization of intangible assets, depreciation expense related to the fair value write-up of acquired property and equipment, acquisition-related costs and restructuring.  We do not include any income tax effect of non-GAAP adjustments as we were unable to recognize a tax benefit on domestic losses incurred in any of the periods presented; accordingly, no adjustment to income taxes for non-GAAP items is required.

Investors are cautioned that there are material limitations associated with the use of non-GAAP financial measures as an analytical tool.  In particular, many of the adjustments to the Company’s GAAP financial measures reflect the exclusion of items that are recurring and will be reflected in the Company’s financial results for the foreseeable future.

Stock-Based Compensation

Stock-based compensation is different from other forms of compensation, as it is a non-cash expense.  For example, a cash salary  generally has a fixed and unvarying cash cost.  In contrast, the expense associated with an equity-based award is generally unrelated to the amount of cash ultimately received by the employee, and the cost to us is based on a stock-based compensation valuation methodology and underlying assumptions that may vary over time.  We believe that excluding non-cash stock-based compensation expense from our operating results facilitates the ability of readers of our financial statements to compare our operating results to our historical results and to other companies in our industry.

Amortization of Intangible Assets

On August 24, 2012, we acquired all of the outstanding common stock of Network Equipment Technologies, Inc. (“NET”) for $41.5 million, or $1.35 per share of NET common stock.  The transaction has been accounted for as a business combination and the financial results of NET have been included in our condensed consolidated financial statements for the period subsequent to its acquisition.  As part of the preliminary purchase price allocation, we recorded $16.8 million of identifiable intangible assets, comprised of developed technology, customer relationships, order backlog and internal use software,  and $29.5 million of goodwill.  We are amortizing the identifiable intangible assets in relation to the expected cash flows from the individual intangible assets over their respective useful lives, which range from 4 months to 7 years.  The amortization of the developed technology, order backlog and internal use software intangible assets is being recorded as cost of revenue (product) and the amortization of the customer relationships is being recorded as sales and marketing expense.

On January 15, 2010, we entered into an intellectual property asset purchase and license agreement with Winphoria, Inc. (“Winphoria”) and Motorola, Inc. (“Motorola”) to purchase certain of Winphoria’s software code and related patents and to license certain other intellectual property from Winphoria and Motorola.  The purchase price included an initial payment of $2.0 million and future potential royalty payments dependent upon future sales of certain of our products that include the Winphoria technology that was purchased or licensed.  In connection with this transaction we recorded identifiable intangible assets which we have classified as developed technology and that are being amortized on a straight-line basis over five years, the expected useful life of the technology.  The amortization expense for these identifiable intangible assets is charged to research and development expense.

We believe that excluding the non-cash amortization of intangible assets facilitates the comparison of our financial results to our historical operating results and to other companies in our industry, and provides meaningful information regarding our liquidity.

Depreciation Expense - Fair Value Write-up of Acquired Property and Equipment

As part of the assessment of the assets acquired and liabilities assumed in connection with the NET acquisition, we were required to increase the aggregate fair value of acquired property and equipment by $2.0 million.  The acquired property and equipment is being depreciated over a weighted average useful life of approximately 2.5 years.  We believe that excluding the incremental depreciation expense resulting from the fair value write-up of this acquired property and equipment facilitates the ability of readers of our financial statements to compare our operating results to our historical results and to other companies in our industry.

Acquisition-Related Costs

We consider certain transition, integration and other acquisition-related costs to be unpredictable and dependent on a significant number of factors that may be outside of our control.  We do not consider these acquisition-related costs to be related to the organic continuing operations of the acquired business and accordingly, we believe they are generally not relevant in assessing or estimating the long-term performance of the acquired assets.  In addition, the size, complexity and/or volume of an acquisition, which often drives the magnitude of acquisition-related costs, may not be indicative of such future costs.  By excluding acquisition-related costs from our non-GAAP measures, management is able to evaluate our ability to utilize our existing assets and estimate the long-term value that acquired assets will generate for the Company.

Restructuring

We recorded $2.0 million of restructuring expense in the third quarter of fiscal 2012 and expect to record approximately $6 million of restructuring expense in the fourth quarter of fiscal 2012 for facilities associated with the continuing integration of NET, severance and related costs.  We believe that excluding restructuring expenses facilitates the comparison of our financial results to our historical operating results and to other companies in our industry and provides meaningful information regarding our liquidity.

SONUS NETWORKS, INC.

Reconciliation of Non-GAAP and GAAP Financial Measures - Outlook

(in millions, except percentages and per share amounts)

(unaudited)

*  Less than $0.01 impact on earnings per share.

SONUS NETWORKS, INC.

Reconciliation of Non-GAAP and GAAP Financial Measures - Historical

(in thousands, except percentages and per share amounts)

(unaudited)