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Cisco Bug: CSCul09906 - CUCM ignoring DTMF capabilities when G.Clear codec is advertised.

Last Modified

May 04, 2016

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


Description (partial)

CUCM ignores DTMF and other audio-call related caps when G.Clear codec is advertised in SDP by the other side.
The understanding is that if an end-point is G.clear capable, it could be a data call and hence CUCM ignores audio call related capabilities like DTMF (to be in compliance with RFC4040).

When the other side advertises G.Clear codec in SDP.
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Bug Details Include

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