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Cisco Bug: CSCuj60711 - IOS sends CRC to Xcoder when receiving Re-Invite causing no way audio

Last Modified

Nov 27, 2020

Products (1)

  • Cisco 2600 Series Multiservice Platforms

Known Affected Releases

15.3(2.1)T

Description (partial)

Symptom:
Once the call is answered, there is no audio in either direction.
Orphaned (inactive) SCCP sessions of the transcoder.

Conditions:
1. Transcoder is invoked due to DTMF/codec mismatch.
2. Re-Invite comes to the gateway with a different ptime value.
e.g. Invite may come with ptime=30 and Re-Invite may come with ptime=20
3. Call flow:
ITSP ---- sip ---- CME ---- voice-hunt grp ----- sip ---- IP Phone
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