I have 2 IP Phones. One of them ( 8811 ) supports and has configured call recording to a recording server that support G729/G722/G711.
I have in configured in CUCM that G722 is disabled for phones that have recording enabled.
There are 3 regions:
Region A - where both phones are located.
Region B - where transcoder is located
Region C - where SIP trunk to recorder server is located
Between and inside all regions 64k is allowed, excepti A -> C, where only 8k is allowed.
When making a call from IP Phone1 -> IP Phone2, G711 is negotiated as expected.
What I can not really understand is - why G722, not G729 is selected towards recorder ? Does inclusion of a transcoder in another Region make CUCM to ignore region relations between the region where IP phone is located and region where SIP trunk to recorder is located ?