Exhibit 99.1


                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


I, Kobi Alexander, Chairman of the Board of Directors and Chief Executive
Officer of Comverse Technology, Inc. (the "Company"), certify, pursuant to 18
U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley
Act of 2002, that to my knowledge:

(1)       the accompanying Annual Report on Form 10-K of the Company for the
          period ending January 31, 2003 (the "Report") filed with the
          Securities and Exchange Commission, fully complies with the
          requirements of Section 13 (a) or 15 (d) of the Securities Exchange
          Act of 1934, as amended; and

(2)       the information contained in the Report fairly presents, in all
          material respects, the financial condition and results of operations
          of the Company.



Dated: April 30, 2003

                                   /s/ Kobi Alexander
                                  ----------------------------------------------
                                  Name:  Kobi Alexander
                                  Title: Chairman of the Board of Directors and
                                         Chief Executive Officer