Let me describe it, and see if you agree with the synopsis:
Asterisk, despite having dtmfmode= set to a particular value in sip.conf for a peer, will listen for SIP Info method transmissions even if RFC2833 is selected. In some phones (Grandstream, in particular) this causes double-transmission of digits, since the phone sends both types of DTMF transmissions without blocking the other. Asterisk should ignore the other two types of DTMF transmission when selected to do one type of reception to counter these types of equiment peculiarities which seem to prevent correct DTMF usage.
If I have described this correctly (I don't know - I don't have visibility into this problem) then can someone else (preferably someone with the problem) open a ticket?
JT
I had the same problem with Grandsteam phones and *. No other hard or soft phones have the 'double digit' problem with *. I don't think Asterisk can do both RFC2833 and in-band DTMF at the same time. It does, however, do RFC2833 and SIP Info at the same time (SIP Info method seems to be on all the time, even when RFC2833 is selected in the sip.conf file). Switching the Grandsteam to SIP Info allowed it to talk to Asterisk and fixed the double digits problem.
- Jim
Chris Albertson wrote:
KG6OMKI think this is a problem on the Asterisk side. I'm seeing the same problem using a Grandstream Budgetone 100. And the GS does have setting for both in-band and RFC2833.
My guess is asterisk is accepting the DTMF tone __both__ ways
It is reading the RFC28833 stuff _and_ "hearing" the audio tones
as well.
--- Tilghman Lesher <mailto:[EMAIL PROTECTED]><[EMAIL PROTECTED]> wrote:
On Sunday 21 December 2003 00:29, Darren Nickerson wrote:<snip>
Folks,
I can't seem to get DTMF signaling working properly using SJphone connecting to Asterisk via a SIP connection. Here's an example of a voicemail session where I entered 1234 for both the username and the password:
-- Incorrect password '11223344' for user '11223f344' (context
Changing the DTMF mode would indeed seem to be the logical solution. However, it appears that SJphone does not support that option (after a quick perusal of their PDF). You might want to file a bugtracker request on their website to implement that functionality.
=====
Chris Albertson
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