Exhibit 32.1

CERTIFICATION 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 Annual Report of Aspect Communications Corporation (the “Company”) on Form 10-K for the period ending December 31, 2004, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), Gary E. Barnett, President, Chief Executive Officer of the Company and Director and James C. Reagan, Executive Vice President and Chief Financial Officer of the Company, each hereby certifies, pursuant to 18 U.S.C. ss. 1350, as adopted pursuant to ss. Section 906 of the Sarbanes-Oxley Act of 2002, 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 result of operations of the Company for the periods presented therein.

/s/ Gary E. Barnett	/s/ James C. Reagan
Gary E. Barnett	James C. Reagan
President and Chief Executive Officer	Executive Vice President and
March 11, 2005	Chief Financial Officer
	March 11, 2005