Re: Branch router, call manager, PRI and call flow
Your assumption is correct. Basically there are 2 things you need to keep in mind. The IP Phones and MGCP gateway communicate with CUCM seperately.
As long as there is connectivity between the CUCM and phones and gateway everything is controlled by CUCM. So when an IP Phone goes off hook and dials out to PSTN, the call routing, digit manipulation is done by CUCM and call is sent out local gateway to PSTN if its configured properly.
Now, if connectivity is lost between the HQ and branch office, since you have SRST configured, the phones will register with local GW. In this case the local gateway becomes a CME and call routing, digit manipulation will be done by the local gateway.
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