Srst |top|: Voice Register Global Mode

Cisco IOS routers can act in two main roles regarding voice:

Here is a breakdown of what each part typically means in Cisco voice networking, which may help you locate the correct documentation: voice register global mode srst

The command voice register global followed by mode srst is a foundational configuration used in Cisco Unified Communications Manager Express (CME) and Survivable Remote Site Telephony (SRST) environments. It establishes how a router handles IP phone registration during a WAN failure. Defining Global SRST Mode Cisco IOS routers can act in two main

: When the WAN link is restored, the phones automatically "re-home" to the primary CUCM cluster, and the router relinquishes control. Configuration Example voice register global mode srst

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