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Cisco Bug: CSCus19671 - MTP fails to forward this MXFarEndAnswer

Last Modified

Mar 01, 2018

Products (7)

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

9.1(2) 9.1(2)ES1 9.1(2)ES2

Description (partial)

Symptom:
Call failure. Unable to switch the call back to audio when fax is rejected.

Conditions:
Initial call audio established. MTP is allocated in the call flow due DTMF mismatch.
SIP endpoint A tries to switch to fax, SIP endpoint B rejects fax as it doesn't support it.
SIP endpoint A tries to switch back to audio, call fails.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
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