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Cisco Bug: CSCul21799 - CUBE resets SSRC to 0 leading to DTMF failure on 3rd party IVR

Last Modified

Apr 27, 2020

Products (1)

  • Cisco UCS B-Series Blade Servers

Known Affected Releases

15.2(2)SA

Description (partial)

Symptom:
CUBE resets SSRC to 0 leading to DTMF failure on 3rd party IVR for component Voice - CUBE has been submitted.

Conditions:
CVP sends reinvite so that media stream connects to IVR -->  CVP send ACK with SDP with c=10.14.2.206 (the IVR) --> 3rd party media gateway sends 200 OK with SDP with c=10.174.20.148 

Note: 3rd party media gateway requires payload type 96 for RFC 2833, and IVR requires payload type 101 for RFC 2833.

This issue might also occur with CWMS and also without CVP.
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