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Cisco Bug: CSCum47080 - If DTMF update not received,SCCP Phone always negotiates to OOB

Last Modified

Feb 25, 2019

Products (1)

  • Cisco Unified Communications Manager (CallManager)

Known Affected Releases


Description (partial)

During the initial SCCP call, the remote endpoint supports only OOB DTMF method and Media Manager detects this. Later on after Redirect to MGCP GW , SIP side should have notified MediaManager regarding the DTMF change. Since DTMF update is not received from the media manager, SCCP always negotiates to OOB and fails to send this dtmf digits

SCCP Phone --> Leaf cluster--> SIP trunk --> SME Cluster --> SIP Trunk-->Leaf cluster--> PSTN
CUCM Version:  8.6(2)22900-9
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