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Cisco Bug: CSCuo12936 - Collab Edge TC endpoint call drops after 30 min

Last Modified

Feb 01, 2017

Products (1)

  • Cisco Unified Communications Manager (CallManager)

Known Affected Releases

10.5(0.99833.3)

Description (partial) 

Symptom:
Call drop between endpoint and bridge through VCS after session fresh reInvite exchange over SIP ICT.

Conditions:
Initial call has multiple codecs negotiated. When refresh timer pops over SIP ICT, CUCM sends reInvite without "+multiple-codecs-in-ans" tag that results in single codec being negotiated. This codec change triggers unnecessary/additional offer/answer exchange across whole call path and results in conflict.
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