Chapter 13. SRST and MGCP Gateway Fallback
One of the primary benefits of a centralized call processing model is the ability to provide remote sites with all the advanced calling features that were previously available only on large campuses. Survivable Remote Site Telephony (SRST) allows a Cisco voice gateway to handle call processing if the connection between the remote site and the central site is severed.
H.323 and Session Initiation Protocol (SIP) gateways are intrinsically resilient to network connectivity failures because the dial plan and call control are in the gateway, and the gateway is always in control of call-routing decisions. Multiple Gateway Control Protocol (MGCP) gateways are under the control of the call agent, and only the ...
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