EXHIBIT 21.1 SUBSIDIARIES OF REGISTRANT Name Jurisdiction of Incorporation - ---- ----------------------------- DSP Telecom, Inc. California CTP Systems, Inc. California D.S.P.C. Technologies Ltd. Israel DSP Telecommunications, Ltd. Israel DSPC Israel Ltd. Israel CTP Systems Ltd. Israel DSP Communications (Japan), Inc. Japan Isotel Corp. New Brunswick, Canada DSPC Europe BVBA Belgium