COMMUNICATION TECHNOLOGY ADVISORS LLC 18 CORPORATE WOODS BOULEVARD THIRD FLOOR ALBANY, NEW YORK 12211 PHONE (518) 462-2632 O FAX (518) 462-3045 As of February 1, 2003 Globix Corporation 139 Centre Street New York, New York 20191 Attention: Peter K....

                                                                   EXHIBIT 10.10

                      COMMUNICATION TECHNOLOGY ADVISORS LLC
                          00 XXXXXXXXX XXXXX XXXXXXXXX
                                   XXXXX XXXXX
                             XXXXXX, XXX XXXX 00000
                    PHONE (000) 000-0000 O FAX (000) 000-0000

As of February 1, 2003

Globix Corporation
000 Xxxxxx Xxxxxx

Xxx Xxxx, Xxx Xxxx 00000
Attention:   Xxxxx X. Xxxxxxxxx
             President and CEO

Dear Xxxxx:

         Reference is made to the letter agreement dated April 19, 2002 (the
"Agreement") by and between Globix Corporation and CTA, pursuant to which Globix
has engaged CTA to act as a consultant to Globix, as extended by that certain
letter agreement dated as of November 1, 2002. This letter shall set forth the
agreement of Globix and CTA to extend the Agreement for an additional
three-month period beginning on February 1, 2003 and ending on April 30, 2003.
Globix and CTA agree that, except as extended as set forth in this paragraph,
all other terms and conditions of the Agreement remain in full force and effect.

         If the foregoing comports with your understanding of the agreement
between Globix and CTA with respect to the subject matter hereof, kindly sign
this letter agreement in the space provided below and fax it back to me at
000-000-0000.

         CTA looks forward to our continued association with Globix.

Very truly yours,



Xxxxx Xxxx, Xx.
Senior Vice President and General Counsel

Accepted and agreed to as of this
1st day of February, 2003.

Globix Corporation

By:    /S/ XXXXX X. XXXXXXXXX
       ----------------------
       Xxxxx X. Xxxxxxxxx
       President and CEO