EXHIBIT 21.1 ASPECT TELECOMMUNICATIONS CORPORATION SUBSIDIARIES OF THE REGISTRANT--JURISDICTION OF INCORPORATION Aspect Telecommunications AG Switzerland Aspect Telecommunications A/S Denmark Aspect Telecommunications B.V. The Netherlands Aspect Telecommunications Canada Company Canada Aspect Telecommunications GmbH Germany Aspect Telecommunications K.K. Japan Aspect Telecommunications Ltd. Hong Kong Aspect Telecommunications Ltd. United Kingdom Aspect Telecommunications NV Belgium Aspect Telecommunications PTE (S) Ltd. Singapore Aspect Telecommunications Pty. Ltd. Australia Aspect Telecommunications SAS France Commerce Soft, Inc. United States TCS Management Group, Inc. United States Voicetek Corporation United States Envoy Holdings Ltd. United States Prospect Software, Inc. United States Aspect Telecommunications International Corporation United States