Interesting.... i assume you set your phone using RFC 2833. becuase some of my phones (AAstra 53i) use SIP info by default, i had to Force RFC2833 Out-of-Band DTMF--checked, DTMF method: rtp in the line n setting, DTMF methond needs to be RTP
My undersanding is even RFC2833 can't fix all the problems. Sometimes i got DTMF errors when i use my IP phone connected directly to ITSP, no Asterisk is involved. I had to press the keys slowly to get it working. and I assumed it was network problem. When network is better, the DTMF works better. based on ITU-T Q.24 spec, one tone has to last more than 40ms to have some gateway to recognize it is a DTMF tone and generate dtmf event. Also, I use tethereal -i any -R "rtpevent.end_of_event == ture" command line to trace DTMF events on Linux command line. hope it will help you to figure out what is going on. Yajie On Thu, Apr 28, 2011 at 10:47 PM, Simon P. Ditner <[email protected]>wrote: > I see this across a wide range of conditions, asterisk 1.4 thru 1.8, sip > with rfc2833, using snom, polycom, and aastra handsets. > > When I sniff the traffic, I see the rfc2833 rtp go into asterisk in the > right order, but it comes out of asterisk in the wrong order. > > --- > Simon P. Ditner > > On 2011-04-28, at 10:29 PM, [email protected] wrote: > > > While we're at it, which device are you using? I've found some handle > better than others. > > ------Original Message------ > > From: [email protected] > > To: Daniel Silver > > To: Simon P. Ditner > > To: [email protected] > > To: 'Asterisk Users Group' > > ReplyTo: [email protected] > > Subject: Re: [on-asterisk] DTMF, will it ever work? > > Sent: 28 Apr 2011 22:28 > > > > And what DTMF mode are you trying to use on both the SIP Trunk and the > device? With RFC2833 on both side and Packet to Packet bridging you > shouldn't have any issues. > > > > > > ------Original Message------ > > From: [email protected] > > To: Simon P. Ditner > > To: [email protected] > > To: 'Asterisk Users Group' > > ReplyTo: [email protected] > > Subject: Re: [on-asterisk] DTMF, will it ever work? > > Sent: Apr 28, 2011 22:27 > > > > Which version of asterisk are you using? > > ------Original Message------ > > From: Simon P. Ditner > > Sender: [email protected] > > To: 'Asterisk Users Group' > > Subject: [on-asterisk] DTMF, will it ever work? > > Sent: 28 Apr 2011 22:22 > > > > Is there some trick to getting asterisk working reliably when calling > > into conference bridges and voicemail? No end of trouble with DTMF on > > my home system regardless of which provider I'm using. Drives my wife > > nuts when she's working from home. > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [email protected] > > For additional commands, e-mail: [email protected] > > > > > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [email protected] > > For additional commands, e-mail: [email protected] > > > > > > Sent from my BlackBerry device on the Rogers Wireless Network > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > > -- Yajie
