EXHIBIT 23.1
                                                                    ------------


                         CONSENT OF INDEPENDENT AUDITORS


We consent to the incorporation by reference in the Registration Statement (Form
S-8) pertaining to the 1999 Stock Incentive Plan of International
Telecommunication Data Systems, Inc. of our report dated February 16, 1999, with
respect to the consolidated financial statements of International
Telecommunication Data Systems, Inc. included in its Annual Report (Form 10-K)
for the year ended December 31, 1998, filed with the Securities and Exchange
Commission.



Stamford, Connecticut
April 29, 1999

                                                               Ernst & Young LLP