[Asterisk-Users] Re: DTMF not sending properly via IAX

[Mark Edwards]

I'd be interested to understand where you read about the 'sequence numbers' 
issue. 
This sounds like it might relate to the problem I am experiencing.
 It's either that, or the DTMF is coming inband over the IAX channel...
 ;-)
 Mark

 On 7/12/05, Tony Mountifield <tony at softins.clara.co.uk> wrote: 
> 
> In article <9e7e0d8a050711154850930e2a at mail.gmail.com>,
> Mark Edwards <mark.p.edwards at gmail.com> wrote:
> >
> > Hi Tony
> > I am having a similar issue to you - from the 'other' direction in that
> > when I connect to * via IAX2 the DTMF is being ignored. I am running 
> HEAD at
> > the moment.
> > (and for the benefit of another subscriber so that they don't have to
> > invoke their autoresponder I acknowlege that DTMF is sent out of band 
> over
> > IAX...)
> > http://bugs.digium.com/view.php?id=4631
> > Does this bear any relation?
> 
> I'm not sure. Incoming DTMF using IAX2 from the PSTN via my provider to my
> box seems to work fine. When my box tries to send DTMF, it appears that
> the first digit of the string is translated by the provider into DTMF 
> tones
> over the PSTN, but then subsequent digits in the same string, although 
> sent
> by IAX2 from my box, are not translated by the provider.
> 
> I remember reading something some time ago about DTMF getting lost due to
> sequence number problems, but I can't remember whether that was SIP or 
> IAX.
> 
> I'm hoping to avoid having to delve into the code myself, due to lack of
> time, and I'm not even sure whether the problem is my end or the 
> provider's.
> 
> Cheers
> Tony
> 
> > Mark
> > On 7/12/05, Tony Mountifield <tony at softins.clara.co.uk> wrote:
> > >
> > > I'm not sure if this is a -users or a -dev question, since the answer
> > > probably comes down to something in the code.
> > >
> > > I'm running the latest CVS-STABLE, and am subscribed to PSTN service
> > > using IAX2 via Voiptalk in the UK.
> > >
> > > I've just been alerted by a customer that the sending of DTMF from my
> > > asterisk box to a remote PSTN user doesn't work, although it used to.
> > >
> > > To test it, I have the following dialplan entries, that I can dial 
> into:
> > >
> > > exten => s,1,Answer
> > > exten => s,2,Wait(2)
> > > exten => s,3,SendDTMF(1234567890)
> > > exten => s,4,Wait(2)
> > > exten => s,5,Hangup
> > >
> > > What happens is that whatever string I give to SendDTMF, I only hear 
> the
> > > first DTMF digit. The remaining digits don't get sent.
> > >
> > > I recently updated from an April CVS-STABLE to the July 4 version, but 
> I
> > > couldn't see any relevant differences in the code. As its a production
> > > system, I can't just revert to test without planning.
> > >
> > > I don't know whether Voiptalk have changed anything.
> > >
> > > Is this a known bug in certain versions of Asterisk?
> > >
> > > If I do iax2 debug, I *can* see DTMF frames being sent and acked for
> > > each digit. Wo I can't understand why I'm not hearing all the digits.
> --
> Tony Mountifield
> Work: tony at softins.co.uk - http://www.softins.co.uk
> Play: tony at mountifield.org - http://tony.mountifield.org
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-- 
regards,

Mark P. Edwards
FWD: 667917
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