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Cisco Bug: CSCsy79619 - CUCM SIP Trunk doesn't preserve call when mid-Call Invite receives 481

Last Modified

Feb 16, 2017

Products (1)

  • Cisco Unified Communications Manager (CallManager)

Known Affected Releases

6.1(3.1000.14) 7.1(2.21900.5)

Description (partial)


SIP trunk call unexpectedly ends after 15 min in to the call when the SIP min-SE CallManager Service Parameter is at its default 1800 seconds setting.


When the CUCM SIP Trunk is utilizing UDP transport protocol and the Trunk Destination device (UAS) reboots or restart for any reason while in an active call and comes back online prior to to the mid-call Invite refresh is sent by CUCM, the destination (UAS) as expected sends a 481 Call Leg/Transaction Does Not Exist message. This message triggers CUCM to clear the call immediately instead of preserving the active call.
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