EXHIBIT 23 INDEPENDENT AUDITORS' CONSENT We consent to the incorporation by reference in Registration Statement No. 333- 44429 on Form S-8 and in Registration Statement No. 333-30799 on Form S-3 of our report dated February 12, 1998, appearing in this Annual Report on Form 10-K/A of Comverse Technology, Inc. for the year ended December 31, 1997. /S/ Deloitte & Touche LLP New York, New York April 24, 1998