EXHIBIT 31.3


     CERTIFICATION BY THE CHIEF EXECUTIVE OFFICER PURSUANT TO SECTION 302 OF
                         THE SARBANES-OXLEY ACT OF 2002



I, Kobi Alexander, Chairman of the Board and Chief Executive Officer of Comverse
Technology, Inc., certify that:

1.   I have reviewed this annual report on Form 10-K/A of Comverse Technology,
     Inc.; and

2.   Based on my knowledge, this report does not contain any untrue statement of
     a material fact or omit to state a material fact necessary to make the
     statements made, in light of the circumstances under which such statements
     were made, not misleading with respect to the period covered by this
     report.

Date:  April 20, 2005
                                                   /s/ Kobi Alexander
                                                   -----------------------------
                                                   Kobi Alexander
                                                   Chairman and CEO
                                                   Principal Executive Officer