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Call Server Settings

The Polycom RealPresence DMA system’s call server capabilities can provide gatekeeper functionality, SIP proxy server and registrar functionality, bandwidth management, and registration sharing from an edge-configured system to a core-configured system. The call server can also function as an H.323-to-SIP and SIP-to-H.323 gateway. The gateway function is used only for calls to registered endpoints, SIP peers, and H.323 gatekeepers. It is not used for calls to virtual meeting rooms (VMRs), virtual entry queues (VEQs), or external IP addresses and does not support content sharing or AES encryption.

The call server also supports SIP forking, where multiple SIP devices may be dialed simultaneously. The first callee to answer gets the call and the remaining callees are gracefully disconnected. The RealPresence DMA system will initiate SIP forking in the following situations:

More than one SIP endpoint contact address is registered to the RealPresence DMA system with the same address-of-record (AOR), another endpoint dials to the system using that same AOR, and the Dial by Registered Endpoint dial action resolves this dial attempt.

Multiple SIP peers are configured for a Dial by SIP Peer dial rule action, and that action is used to resolve a dial attempt to the RealPresence DMA system.

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