Cisco Bug: CSCuj09195 - PGW2200 Fax T.38 fails after negotiation
Feb 08, 2017
- Applications for Cisco Unified Application Environment
Known Affected Releases
Symptom: T.38 call fails in an ISUP to SIP call through PGW. .FaxUpspeedCodecPreference = null in XECfgParm.dat Conditions: PSTN—ss7—PGW---sip—SBC—sip—client | MGX 1. The first invite is a normal one with m=audio and codecs and acked by PGW. 2. The second invite with m=image having a new sdp and t.38 parameters is acked by PGW fine. 3. The third invite having the same sdp and m=image parameter arrives but the 200 OK is different with m=audio, leading to a different offer-answer state, hence ending the call.
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