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Cisco Bug: CSCuq23534 - CUCM should complete call processing before ACK or buffer reINVITE

Last Modified

Dec 11, 2017

Products (7)

  • Cisco Unified Communications Manager (CallManager)
  • Cisco Intercompany Media Engine
  • Cisco Unity Connection Version 9.1
  • Cisco Business Edition 5000 Version 9.1
  • Cisco Unified Communications Manager Version 9.1
  • Cisco Business Edition 6000 Version 9.1
  • Cisco Unified Communications Manager Session Management Edition

Known Affected Releases

10.5(1.98300.4) 8.6(2.98000.2) 9.1(2)

Description (partial)

Intermittent call failures triggered by CUCM sending "488 Not Acceptable Media" responses to inbound mid-call re-INVITEs

Race condition is observed and CUCM sends SIP "488 Not Acceptable Media" to a mid-call re-INVITE if it is received in less than 40msec after the ACK from the previous dialogue.
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