SYSTEM FOR INTER-COMMUNICATION BETWEEN INTEGRATED DIGITAL ENHANCED NETWORK SYSTEMS AND PUSH-TO-TALK-OVER-CELLULAR SYSTEMS

摘要

A network-to-network interface (NNI) gateway system for inter-communication between a Push-to-talk-over-Cellular (POC) system in a first wireless network and an Integrated Digital Enhanced Network (iDEN) system in a second wireless network. The POC system performs a POC call session for POC mobile units in the first wireless network. The iDEN system performs a Push-to-Talk (PTT) call session for iDEN subscriber units in the second wireless network. The gateway system bridges the iDEN system to the POC system, such that the POC system is exposed to the iDEN system as an emulated iDEN system, the iDEN system is exposed to the POC system as an emulated POC system, and calls are placed across the first and second wireless networks between the POC mobile units and iDEN subscriber units.