EXHIBIT 7.1 JOINT FILING AGREEMENT The undersigned hereby agree that the Amendment No. 6 to Schedule 13D to which this Joint Filing Agreement is attached as Exhibit 7.1, is filed on behalf of each of us. Date: April 10, 1998 Gold & Appel Transfer,...

                          EXHIBIT 7.1

                     JOINT FILING AGREEMENT

The undersigned hereby agree that the Amendment No. 6 to Schedule 13D to which
this Joint Filing Agreement is attached as Exhibit 7.1, is filed on behalf of
each of us. 

Date:     April 10, 1998           

                                   Gold & Xxxxx Transfer, S.A.,
                                   a British Virgin Islands corporation


                                   By: /s/ Xxxx Xxxxxxxx
                                      ------------------------------------- 
                                        Xxxx Xxxxxxxx, Attorney-in-Fact for
                                        Gold & Xxxxx Transfer, S.A.

                                        /s/ Xxxx Xxxxxxxx
                                      -------------------------------------    
                                            Xxxx Xxxxxxxx