Exhibit 24.8

                  Certified Resolution as to Power of Attorney

           The undersigned hereby certifies on behalf of Carrier 1 International
S.A., a societe anonyme organized under the laws of the Grand Duchy of
Luxembourg (the "Company") that the Board of Directors of the Company at a
meeting held on the 11th day of January, 2000, duly adopted resolutions
substantially in the form of the following; and that said resolutions are in
full force and effect:

           "that any Authorized Officer (as defined below), be, and each of them
           hereby is authorized and empowered to execute and cause the
           Registration Statement to be filed with the Commission, in the name
           and on behalf of the Company, with such changes therein as such
           officers executing the same shall deem necessary or advisable and
           shall approve, such approval to be conclusively evidenced by such
           execution; and that each of the Authorized Officers be, and hereby
           is, authorized to prepare or cause to be prepared, to execute in the
           name and on behalf of the Company, and cause to be filed with the
           Commission, such amendments (including, without limitation, any
           pre-effective and post-effective amendments and any subsequent
           registration statements pursuant to Rule 462(b) under the Securities
           Act) to the Registration Statement and supplements to the prospectus
           or prospectuses forming a part thereof as such officers may deem
           necessary or advisable, an "AUTHORIZED OFFICER" being any one of (i)
           the members of the Board of Directors of the Company, (ii) Stig
           Johansson, Eugene A. Rizzo, Kees van Ophem, Neil E. Craven, Terje
           Nordahl, Joachim W. Bauer and (iii) any other person designated by
           one or more members of the Board of Directors of the Company to act
           on his or her behalf;"

           WHEREBY the Company has caused this certificate to be executed on its
behalf by the undersigned this 20th day of January, 2000.

                                /s/ Kees van Ophem
                                -----------------------------------------------
                                Kees van Ophem
                                Vice President -- Purchase and General Counsel