Förfarande och anordning för att initiera en anslutning mellan en dator ansluten till ett IP-nät och en dator ansluten till ett annat nät

A method and a system for initiating a connection between a first computer (19) connected to an IP network (13) and at least one second computer (3) connected to a network (1) where the location is indicated by another number than an IP-address, the two networks being connected through at least one access router (9,11;63). According to the invention the method comprises the steps: receiving in a device (21;63) in the IP network from the first computer (19) a request of being connected to the at least one second computer (3); identifying, in the device (21;61) a number corresponding to the IP-address of each second computer (3); sending information about this at least one corresponding number to one of the access routers (11;63); receiving this information in the access router (11;63), which sets up a line from the first computer (19) to each second computer (3);