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Cisco Bug: CSCup86835 - Glare between 2 UPDATEs where CUCM not sending 200 OK to INVITE.

Last Modified

Nov 10, 2017

Products (1)

  • Cisco Unified Communications Manager (CallManager)

Known Affected Releases

10.5(1.98000.97)

Description (partial)

Symptom:
Glare between 2 UPDATEs where CUCM not sending 200 OK to INVITE.
Call forwards back to ITSP involving Unity connection can fail due to this timing issue.

Conditions:
Call flow:
TELCO=>sip=>CUBE=>sip=>CUCM=> CUC =>CUCM=>sip=>CUBE=>sip=>Telco

UPDATE needs to be enabled in this call flow, and Telco shouldn't be supporting the UPDATE
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