Exhibit 23.1 INDEPENDENT AUDITORS' CONSENT We consent to the incorporation by reference in this Registration Statement of Aspect Communications Corporation on Form S-8 of our reports dated January 18, 1999 and March 25, 1999, appearing in and incorporated by reference in the Annual Report on Form 10-K of Aspect Communications Corporation for the year ended December 31, 1998. DELOITTE & TOUCHE L.L.P. /s/ Deloitte & Touche LLP San Jose, California November 22, 1999