EXHIBIT 5.1

                                Paul L. Robinson
                                909 Third Avenue
                            New York, New York 10022

                                 August 29, 2005

Comverse Technology, Inc.
909 Third Avenue
New York, New York 10022

         Re:    Comverse Technology, Inc.
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Gentlemen:

I have acted as legal counsel to Comverse Technology, Inc., a New York
corporation (the "Company"), in connection with the preparing and filing with
the Securities and Exchange Commission of the registration statement on Form S-8
(the "Registration Statement") under the Securities Act of 1933, as amended,
with respect to 6,000,000 shares of common stock, par value $.10 per share, of
the Company (the "Common Stock") issuable pursuant to awards to be made under
the Company's 2005 Stock Incentive Compensation Plan (the "Plan").

In so acting, I have examined originals or copies (certified or otherwise
identified to my satisfaction) of the Registration Statement, the Plan and such
corporate records, agreements, documents and other instruments, and such
certificates or other comparable documents of public officials and of officers
and representatives of the Company, and have made such inquiries of such
officers and representatives, as I have deemed relevant and necessary as a basis
for the opinions hereinafter set forth.

In such examination I have assumed the genuineness of all signatures, the legal
capacity of all natural persons, the authenticity of all documents submitted to
me as originals, the conformity to original documents of all documents submitted
to me as certified, conformed or photostatic copies and the authenticity of the
originals of such latter documents. As to all questions of fact material to
these opinions that have not been independently established, I have relied upon
certificates or comparable documents of officers and representatives of the
Company.

Based on the foregoing and subject to the qualifications stated herein, I am of
the opinion that the Common Stock to be issued under the Plan pursuant to the
Registration Statement has been duly authorized and, when issued and delivered
upon receipt by the Company of consideration constituting lawful consideration
under New York law in accordance with the Plan, will be validly issued, fully
paid and nonassessable (except, where applicable, as provided by Section 630 of
the New York Business Corporation Law).

The opinion expressed herein is limited to the laws of the State of New York,
and I express no opinion as to the effect on the matters covered by this letter
of the laws of any other jurisdiction. This opinion is given as of the date
first set forth above, and I assume no obligation to update this opinion.

I hereby consent to the use of this letter as an exhibit to the Registration
Statement, but in giving this consent, I do not thereby admit that I am in the
category of persons whose consent is required under Section 7 of the Securities
Act of 1933, as amended, or the rules and regulations thereunder. This letter
may not be relied upon in connection with any other filing or transaction
without my express written consent.

                                                      Very truly yours,

                                                      /s/ Paul L. Robinson
                                                      --------------------------
                                                      Paul L. Robinson