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Cisco Bug: CSCsy88264 - SIP unsolicited notify dtmf sometimes cause call to drop

Last Modified

Nov 14, 2016

Products (1)

  • Cisco Unity Express

Known Affected Releases


Description (partial)

Calls to CUE autoattendent or other CUE applications using DTMF are
terminated seemingly at random. Specifically, sometimes when CME
sends DTMF in an unsolicited SIP NOTIFY request, CUE sends an error
response with status code 500. CME reacts by terminating the call.

Unsolicited notifications (sip-notify) are used for carrying DTMF from
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
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  • Related Community Discussions
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