Exhibit 32.1

CERTIFICATION CHIEF EXECUTIVE OFFICER PURSUANT TO

18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

In connection with the quarterly report on Form 10-Q of Vertical Communications, Inc. (the “Company”) for the period ended September 30, 2007 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I , William Y. Tauscher, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (the “Act”), that:

(1) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: November 19, 2007	/s/ William Y. Tauscher
	William Y. Tauscher
	Chief Executive Officer