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EXHIBIT 23.1
INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM'S
CONSENT
We
consent to the incorporation by reference in the Registration
Statement of Zoom Telephonics, Inc. on Form S-8 [File Nos. 333-209807 and
333-173143] of our report dated April 14, 2020 with respect to our
audits of the consolidated financial statements of Zoom
Telephonics, Inc. as of December 31, 2019 and 2018 and for each of
the two years in the period ended December 31, 2019, which report
is included in this Annual Report on Form 10-K of Zoom Telephonics,
Inc. for the year ended December 31, 2019.
/s/
Marcum LLP
Boston,
MA
April
14, 2020