Hi, I have encountered a DTMF issue. My scenario: Access carrier-----sip----> Asterisk-1.4.25.1-----sip---->CiscoGW-----ISDN----->TDM Switch the access carrier sends to Asterisk out of band (rfc2833) dtmf, Asterisk forwards it with SIP INFO method to Cisco gateway, but on TDM switch every digit is duplicated. Is it possible that the carrier sends inband along with rfc2833? Kind regards, Szabolcs Szasz -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20100301/f48b9334/attachment.htm
On Mon, Mar 1, 2010 at 9:25 AM, Szasz Szabolcs <szasz.szabolcs at gmail.com> wrote:> Hi, > > I have encountered a DTMF issue. My scenario: > > Access carrier-----sip----> > Asterisk-1.4.25.1-----sip---->CiscoGW-----ISDN----->TDM Switch > > the access carrier sends to Asterisk out of band (rfc2833) dtmf, Asterisk > forwards it with SIP INFO method to Cisco gateway, but on TDM switch every > digit is duplicated. Is it possible that the carrier sends inband along with > rfc2833?Possible? Sure. Also possible that Cisco is passing along the in-band, as well as converting the out-of-band to in-band, ergo two for one. You can also tune the DTMF on the Cisco to ignore or set parameters on DTMF. Refer to the IOS guide for the appropriate arguments. Even worse, it's possible that you have a lot of echo, and the DTMF is echo-y enough that it gets interpreted as two-for-one. Can you take asterisk out of the loop, terminate sip carrier straight into Cisco for testing?
On Mon, Mar 1, 2010 at 9:40 AM, David Backeberg <dbackeberg at gmail.com> wrote:> On Mon, Mar 1, 2010 at 9:25 AM, Szasz Szabolcs <szasz.szabolcs at gmail.com> wrote: >> Hi, >> >> I have encountered a DTMF issue. My scenario: >> >> Access carrier-----sip----> >> Asterisk-1.4.25.1-----sip---->CiscoGW-----ISDN----->TDM Switch >> >> the access carrier sends to Asterisk out of band (rfc2833) dtmf, Asterisk >> forwards it with SIP INFO method to Cisco gateway, but on TDM switch every >> digit is duplicated. Is it possible that the carrier sends inband along with >> rfc2833? > Can you take asterisk out of the loop, terminate sip carrier straight > into Cisco for testing?You could also make a really simple dialplan object to do some DTMF directly with a channel on the asterisk, to see if things work properly going just that far.
Thank you David, I did an IVR on Asterisk wich reads for the caller the entered digits, it's working. I did traces for the same call on access side (where the dtmfs come with rfc2833 method) and the other interface where I send the dtmfs with sip info method to Cisco gateway. Both side seems to be OK, no duplicates. Kind regards, Szabolcs Szasz On Mon, Mar 1, 2010 at 9:40 AM, David Backeberg <dbackeberg at gmail.com <http://lists.digium.com/mailman/listinfo/asterisk-users>> wrote:>* On Mon, Mar 1, 2010 at 9:25 AM, Szasz Szabolcs <szasz.szabolcs at gmail.com <http://lists.digium.com/mailman/listinfo/asterisk-users>> wrote:*>>* Hi, *>>* *>>* I have encountered a DTMF issue. My scenario: *>>* *>>* Access carrier-----sip----> *>>* Asterisk-1.4.25.1-----sip---->CiscoGW-----ISDN----->TDM Switch *>>* *>>* the access carrier sends to Asterisk out of band (rfc2833) dtmf, Asterisk *>>* forwards it with SIP INFO method to Cisco gateway, but on TDM switch every *>>* digit is duplicated. Is it possible that the carrier sends inband along with *>>* rfc2833? *>* Can you take asterisk out of the loop, terminate sip carrier straight *>* into Cisco for testing? * You could also make a really simple dialplan object to do some DTMF directly with a channel on the asterisk, to see if things work properly going just that far. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20100301/b8667559/attachment.htm