The communication system comprising a dedicated processing system, a call processing system, and an interworking system. The dedicated processing system is configured to generate and transfer a first call setup message. The call processing system is configured to receive and process the first call setup...http://www.google.fr/patents/US6870857?utm_source=gb-gplus-shareBrevet US6870857 - Communication system for dedicated and switched communications
Communication system for dedicated and switched communications
