Used Cisco MGX 8880 -
Voice Interworking Service Module

Part # VISM-PR

Product Description: The Cisco VISM-PR offers a field-proven full set of voice-over-IP (VoIP) and voice-over-ATM (VoATM) features, including toll-quality voice, fax, and modem. The Cisco VISM-PR can be deployed in standalone configurations or with softswitches to enable a variety of packet voice services in network architectures using the Media Gateway Control Protocol (MGCP), PacketCable™ Trunking Gateway Control Protocol (TGCP), H.323, and Session Initiation Protocol (SIP).