Patent ID: 6931008

Claim:
A communication system comprising: a narrowband system configured to receive and process a first signaling message and a user communication to transfer a second signaling message and the user communication: an interworking system coupled to the narrowband system and configured to interwork between the user communication including a first header identifier and the user communication received by the narrowband system, and to interwork between the user communication transferred by the narrowband system and the user communication including a second header identifier; a broadband system coupled to the interworking system and configured to route the user communication including the first header identifier to the interworking system based on the first header identifier, and to route the user communication including the second identifier from the interworking system based on the second header identifier; a processing system configured to receive and process the second signaling message from the narrowband system to transfer a control message to the interworking system indicating the second header identifier; and wherein: the interworking system is configured to receive the control message indicating the second header identifier, and in response to the control message, to interwork between the user communication transferred by the narrowband system and the user communication including the second header identifier.