Method and communication system for establishing an H.323 or SIP connection from a source network to an external connection target

摘要

An H.323 connection system establishes links between local networks (LAN1,LAN2,LAN3) over wide area networks (WAN1,WAN2) which have gateways (GW1, GW2) that extract transport addresses (IPGW2) from different parts of the logical address information (030-222).