DTMF recognition

pbk · May 11, 2008, 3:52pm

Hi,

On TDM22B(2fxs, 2fxo) , my internal phones and a sip soft phones are recognizing dtmf. But, for the pots incoming call , asterisk is able to play audio, not recognizing dtmf tones. I tried “relaxdtmf” option in zapata.conf, it is not helping. My incoming line is a VOIP sevice provider if this info will help you. Please help.

regards

Majamer · May 12, 2008, 5:44pm

did you try dtmfmode=inband in the extension’s config?

pbk · May 17, 2008, 1:30pm

Hi,

Somebody please post a working solution. which dtmf option will work with pstn incoming lines? I tried with available options like inband, info, rfc2833 in zapata.conf and nothing seemed to work. My locally attached phone line and softphones from sip are ok. Also, let me know which file(zapata, extensions) to mention these options and in which section (globals, general etc).
Is it anything to do with my firewall or NAT? The audio is played back fine on pstn line.

regards

pbk · May 17, 2008, 1:38pm

Hi,

Oh. By the way mine is asterisk 1.4.19.1 and zaptel 1.4.10 on openSuse 10.3.

fyi

pbk · May 17, 2008, 6:26pm

Hi,

I’m debugging with rtp debug and not seeing incoming packets. could be a firewall issue. working on it.

regards

pbk · May 17, 2008, 6:39pm

Hi,

I think rtp debug is only for SIP based phones. I still have the pstn issue.

pbk · May 19, 2008, 12:56am

hi,

I figured that my voip adapter from my phone provider was twisting the tones.

fyi

amturnip · May 20, 2008, 12:28am

How did you figure it out?

pbk · May 20, 2008, 2:27am

simple! just hear the tones if you have good ears

pbk · May 22, 2008, 10:13pm

Hi,

Still, I have a X-lite softphone that is working within the local wi-fi network, I have a problem across internet. If the softphone is outside the NAT, I could send audio to the phone, but could not receive the dtmf digits. Somehow they got missed. Can someone help me on this? To which port of asterisk I have to forward to get digits?

regards

pbk · May 26, 2008, 3:31am

Hi,

Somebody please help!!! From what I understand, the external softphone is sending (somehow missing NAT) its IP as a local address (starting like 192.168.) and the asterisk code in chan_sip.c is trying to send the replies to this non-existent local address. Is it possible to set up this x-lite(or any softphone for that matter) so that they identify themselves as external IP address?