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Cisco Bug: CSCum50133 - H.245 - SIP OOB DTMF Conversion fails with "No Preference" on SIP Trunk

Last Modified

Aug 02, 2019

Products (1)

  • Cisco Unified Communications Manager (CallManager)

Known Affected Releases


Description (partial)

++ H.245 - SIP OOB DTMF Conversion fails with "No Preference" on SIP Trunk.
++On CCM Traces, we will see following in trace snippet:

14209221.001 |05:31:52.979 |AppInfo |H245ASN - TtPid=(78986) [0xb0939d70 1448 bytes] -Incoming #845588 -value MultimediaSystemControlMessage ::= indication : userInput : alphanumeric : "1"

14209231.001 |05:31:52.979 |AppInfo |SIPCdpc(468550) - star_CcUserInfoReq: Outbound DTMF method selected is 0. Digit=1 and isMTPPassingThru2833=0
14209231.002 |05:31:52.979 |AppInfo |SIPCdpc(468550) - star_CcUserInfoReq: Outbound DTMF method not supported (0)

++ Incoming leg must use H.245 Signal / Alphanumeric DTMF and Outgoing leg must negotiate KPML / Notify.
++ "No Preference" must be configured as DTMF Preference on outgoing SIP Trunk.
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