I have a scenario where outbound to SIP ITSP I’m using early offer (no CUBE, direct SIP trunks on the CUCM). The IP Phone to the SIP Trunk is configured with Region relationship of a maximum bandwidth of 8k.
Outbound to the ITSP I have the below attributes in the INVITE SDP:
m=audio 23004 RTP/AVP 113 115 18 101
The ITSP is replying with a Session 183 with the following SDP:
I have questions from the above guides:
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