Voice Register Global Mode Srst |best| -

A common misconfiguration involves forgetting that voice register global controls SIP phones, while call-manager-fallback controls SCCP phones. Administrators often configure call-manager-fallback and wonder why their SIP phones do not register during a test. in a mixed environment.

: Defines the maximum number of phone devices allowed to register. voice register global mode srst

The command enters the configuration mode for SIP SRST parameters, and the sub-command mode srst explicitly tells the Cisco IOS router to treat this configuration block as a fallback service for SIP endpoints, rather than a standalone CME (Communications Manager Express) system. voice register global mode srst

: Specifically tells the router to act as a fallback registrar for SIP phones. voice register global mode srst