SYSTEM FOR CALL FORWARDING FROM A FIRST COMMUNICATION NETWORK TO A SECOND REMOTE COMMUNICATION NETWORK AND A SYSTEM FOR VIRTUAL EXTENSION OF A MOBILE COMMUNICATION NETWORK BY AT LEAST A SECOND, REMOTE MOBILE COMMUNICATION NETWORK

摘要

Disclosed is a system for call forwarding from a first communication network to a second remote communication network, whereby the second communication network is one of several GSM-type mobile-communication network. The system comprises a bridgehead located in the area of the first communication network, the bridgehead serving as an internetwork junction between the first communication network and the second communication networks (transition network). Calling numbers of the first communication network are assigned to the bridgehead to which calling numbers of the first communication network are assignable by call forwarding, the calling numbers being converted to GSM-type calling numbers in the bridgehead. The bridgehead is connected to a Mobile Services Switching Center (MSC) of the transition network via signalling and intelligence signal channels and provides the basic services of subscribers of a GSM-type mobile-communication network.