[Freeswitch-users] Freetdm bridge to SIP DTMF problem

[Jakub Ouhrabka]

Hi,

we've changed OpenZAP to FreeTDM sometime ago and from that time we're
experiencing problems with DTMF.

We're bridging incoming ISDN30 calls from Sangoma A108DE card + libri +
FreeTDM to SIP outgoing calls. Freeswitch is recognizing DTMF correctly 
but DTMF is not send to outgoing SIP call - it's not present in RTP 
stream trace (we've setup RFC2833 DTMF signalling). When bridging the 
call back to ISDN30 DTMF works correctly.

We're using latest versions of all software as of 1 month ago.

Below are attached two snippets of logs: first is bridging back to 
ISDN30 where DTMF is sent to called party. Second is bridging to SIP 
where DTMF is not sent to the called party.

We've tried it with both <action application="start_dtmf" /> on and off 
with no success.

Any pointers how to investigate the issue?

Thanks,

Jakub

Log snippets:

ISDN30 to ISDN30 bridge - DTMF ok

2011-08-18 12:31:45.950158 [DEBUG] ftmod_wanpipe.c:1545 [s1c11][1:11] 
read wanpipe event 3
2011-08-18 12:31:45.950158 [DEBUG] ftmod_wanpipe.c:1415 [s1c11][1:11] 
Queuing wanpipe DTMF: 5
2011-08-18 12:31:45.950158 [DEBUG] ftdm_io.c:3504 [s1c11][1:11] Queuing 
DTMF 5 (debug = 0)
2011-08-18 12:31:45.950158 [DEBUG] mod_freetdm.c:733 Queuing DTMF [5] in 
channel FreeTDM/1:11/XXXXXXXXX
2011-08-18 12:31:45.970623 [DEBUG] switch_ivr_bridge.c:391 Send signal 
FreeTDM/1:5/XXXXXXXXX [BREAK]
2011-08-18 12:31:45.991084 [DEBUG] ftdm_io.c:3694 [s1c5][1:5] Generating 
DTMF [5]

ISDN30 to SIP bridge - DTMF not forwarded

2011-08-18 12:34:05.287480 [DEBUG] ftmod_wanpipe.c:1545 [s1c29][1:29] 
read wanpipe event 3
2011-08-18 12:34:05.607708 [DEBUG] ftmod_wanpipe.c:1545 [s1c29][1:29] 
read wanpipe event 3
2011-08-18 12:34:05.607708 [DEBUG] ftmod_wanpipe.c:1415 [s1c29][1:29] 
Queuing wanpipe DTMF: 6
2011-08-18 12:34:05.607708 [DEBUG] ftdm_io.c:3504 [s1c29][1:29] Queuing 
DTMF 6 (debug = 0)
2011-08-18 12:34:05.607708 [DEBUG] ftmod_libpri.c:1586 -- Caught Event 
span 1 18 (KEYPAD_DIGIT)
2011-08-18 12:34:05.628171 [DEBUG] mod_freetdm.c:733 Queuing DTMF [6] in 
channel FreeTDM/1:29/XXXXXXXXXXXXXXX
2011-08-18 12:34:05.628171 [DEBUG] switch_ivr_bridge.c:391 Send signal 
sofia/external/XXXXXXX at XXXXXXX:5060 [BREAK]