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Cisco Bug: CSCul23823 - iLBC RSVP MGCP call over SIP EO fails

Last Modified

Nov 14, 2015

Products (1)

  • Cisco Unified Communications Manager (CallManager)

Known Affected Releases

10.0(0.97026.9)

Description (partial)

Symptom:
MGCP POTS on cluster1 calls SCCP phone on Cluster 2 over Sip EO trunk.
The call gets disconnected once the SCCP Phone on cluster 2 answers.

Ref: http://cibu-jira:8080/browse/MCNTRL-3766

Conditions:
For EO enabled trunks, when gateway sends an initial offer and remote side answers with only ilbc codec, The MGCP interface does not have the incoming channel information and defaults to G711(instead of ilbc) and remote side to ilbc . So when the MDCX is sent the GW rejects the same and call fails.
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