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Cisco Bug: CSCul05574 - Intermittent DTMF failure with KPML in Callmanager

Last Modified

Sep 18, 2015

Products (1)

  • Cisco Unified Communications Manager (CallManager)

Known Affected Releases


Description (partial)

Intermittent DTMF failure when user dialing into Bridge.

When OOB DTMF method like KPML/Notify is used, and subscribe event is sent immediately after sending 183/SDP (Early media cut-through) . Due to race condition or asynchronous routing/load-balancing in network, 
can result the subscribe message to be received first before 183/SDP.
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