[Freeswitch-users] Exchange 2007 UM - DTMF problem

[Matt Darnell]

On Fri, Jul 25, 2008 at 8:51 PM, UV <uv at talknet.com.au> wrote:
> Yes I did, but you might not even need that.
> Try adding <param name="pass-rfc2833" value="true"/> in your external SIP
> profile and see if it solves the problem.
>

I am still trying to get the DTMF 100%, I added the value but get this
message in the debug log:
[WARNING] mod_sofia.c:787 sofia_receive_message() Cannot pass 2833 on
a transcoded call

It does not appear that any transcoding is happening from the SIP
setup messages.

I found this, but it doesn't give any clue.
	case SWITCH_MESSAGE_INDICATE_TRANSCODING_NECESSARY:
		if (tech_pvt->rtp_session &&
switch_rtp_test_flag(tech_pvt->rtp_session,
SWITCH_RTP_FLAG_PASS_RFC2833)) {
			switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "Cannot
pass 2833 on a transcoded call.\n");
			switch_rtp_clear_flag(tech_pvt->rtp_session, SWITCH_RTP_FLAG_PASS_RFC2833);
		}
	break;


-Matt