IP Office is not an H.248 gateway under the control of
Communication Manager.
IP Office is a telephony system and SIP gateway connected through SIP to
Session Manager.
IP Office as a Branch solution has the following limitations:
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A Session Manager and SIP gateway solution with IP Office Branch does not support the Communication Manager Inter-Gateway Alternate Routing (IGAR) feature.
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Communication Manager cannot directly control the media resources of the IP Office. In Sunny day mode, Communication Manager based media services, such as conferencing and Music on Hold, deliver media to the branch from a central Communication Manager gateway resource.
