Cisco Bug: CSCtd94341 - Marker bit is not set in the RTP packet w/ an RFC2833 DTMF event
Jun 05, 2010
- Cisco UC Integration(TM) for Microsoft Office Communicator
Known Affected Releases
Symptom: DTMF is not working when using softphone client from CSF (like cucimoc leverages). Dtmf from hardphone control is working ok. Conditions: CUCIMOC from before 8.0. In sniffer trace you will see that marker bit of the first RFC2833 packet is not set. This is not compliant with RFC which may make the remote device ignore the DTMF packets.
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