Supported IP/VoIP Hardware
Exchange Server 2010 unified messaging relies on the capability of the IP/VoIP gateway to translate time-division multiplexing (TDM) or telephony circuit-switched based protocols, such as Integrated Services Digital Network (ISDN) or QSIG, from a PBX to protocols based on voice over IP (VoIP) or IP, such as Session Initiation Protocol (SIP), Real-Time Transport Protocol (RTP), or T.38 for real-time facsimile transport.
Although there are many types and manufacturers of PBXs, IP/VoIP gateways, and IP/PBXs, there are essentially two types of IP/VoIP gateway component configurations:
• IP/VoIP Gateway—A legacy PBX and an IP/VoIP gateway provisioned as two separate devices. The Unified Messaging server communicates with ...
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