MGCP Gateway Fallback

MGCP Gateway Fallback

MGCP gateway fallback is a feature that improves the reliability of MGCP branch networks. A WAN link connects the MGCP gateway at the remote site to the Cisco Unified CallManager at the central sites (that is, the MGCP call agent). If the WAN link fails, the fallback feature keeps the gateway working as an H.323 gateway, as depicted in Figure 6-39.

Figure 6-39. Survivable Remote Site Telephony

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MGCP gateway fallback works in conjunction with the Survivable Remote Site Telephony (SRST) feature. SRST allows Cisco gateways and routers to manage connections temporarily for Cisco IP phones when a connection to a Cisco Unified CallManager is unavailable.