We did an upgrade from CUCM version: 184.108.40.206079-1 to CUCM version: 220.127.116.1100-5.
The problem now is that 95% of the incomming faxes are not coming into the fax server. (Some faxes are reveived)
pri -> gateway (MGCP) -> CUCM -> ICT -> fax server
In de CUCM logs we see the next:
2 MDCX messages being sent to the gateway. The second one was being ignored.
This was because BOTH MDCX requests were in a=sendrecv mode. However, in the first MDCX, there is NO codec mentioned, while in the second there is.We believe this may be the reason for the MGCPInterface() not doing anything later in the call.
Did someone already had the same issue or knows a solution for the issue that i'm facing?
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