Hi friends!
Our company is developing a call recorder based on built-in-bridge technology. This recorder uses the DTMF (RFC-2833) signals from the telephones to activate some custom processing. We did all development using phone 7911 and CUCM 8.6 as a test base, getting awesome results.
However, we started testing other phones with BiB technology and got stuck at Phone 6921, because we couldn't find a way to make it send DTMF events ( both received and transmitted ) to the recorder.
When sniffing the network, after pressing some button on the keypad, we see this phone sending a SIP NOTIFY with DTMF data to the Call Manager, a RFC-2833 event to the far-end's RTP stream, but no RFC-2833 event to the recorder's RTP stream.
Is there some configuration we are missing out?? Is this a known bug or limitation??
Thanks in advance
