EXHIBIT 24.5

                            SPECIAL POWER OF ATTORNEY

         The undersigned constitutes and appoints Stig Johansson, Joachim W.
Bauer, Kees van Ophem, Neil E. Craven, Eugene A. Rizzo and Terje Nordahl and
each of them, his true and lawful attorney-in-fact and agent with full power of
substitution and resubstitution, for him and in his name, place, and stead, in
any and all capacities, to sign the Annual Report on Form 10-K for the fiscal
year ended December 31, 2000, for filing with the Securities and Exchange
Commission by Carrier1 International S.A. a Luxembourg corporation, together
with any and all amendments to such Form 10-K, and to file the same with all
exhibits thereto, and all documents in connection therewith, with the Securities
and Exchange Commission, granting to such attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the premises, as fully and to
all intents and purposes as he might or could do in person, hereby ratifying and
confirming all that such attorneys-in-fact and agents, or each of them, may
lawfully do or cause to be done by virtue hereof.

         DATED:   March 30, 2001

                                                    /s/ Thomas J. Wynne
                                                    ----------------------------
                                                    Name:  Thomas J. Wynne