[Asterisk-Users] Asterisk, inband DTMF send by a GSM mobile

[Mark Eissler]

On Feb 15, 2005, at 10:09 AM, Florian Lefeuvre wrote:

> Hi all,
>
> I use a GSM device to send dtmf on my asterisk system (via SIP).
> the codec I use is ulaw (or a-law).
> dtmf mode is INBAND.
> relaxmode is on.
> but most of the case,  I 'missed' some DTMF or
> I 'double' one.
> as anybody as seen this before?
> is there any way to prevent this
>

I suffer from this problem all of the time but I'm configured for 
out-of-band dtmf on the asterisk side thanks to IAX2 trunking. I think 
the problem is GSM or maybe cell phones in general. I know this has 
been discussed before.

-mark

--
Mark Eissler, mark at mixtur.com
Mixtur Interactive, Inc. - at - http://www.mixtur.com