[Asterisk-Users] INBAND DTMF G729 ASTERISK

[Matt Fredrickson]

On Fri, Jun 24, 2005 at 11:59:51AM -0400, Julio Arruda wrote:
> Andrew Kohlsmith wrote:
> >On Friday 24 June 2005 10:58, denis at isolve.com.br wrote:
> >
> >>But there are some products that supports DTMF inband on G729. Ok, it will
> >>not work in most cases(like everyone told) but why Asterisk dont support
> >>it? Is this hardcoded, or is possible to try it out?
> >
> >
> >Asterisk can do it too, it's just not reliable on any platform.  Set 
> >dtmfmode=inband and use the g729 codec; that's all there is to it.  You 
> >will be disappointed though.
> >
> I think that IAX, as one example, won't allow this ? Have a faint memory 
> of some error message when trying it (maybe was ILBC+iax ?)

IAX always sends DTMF out of band.  That's why SIP sucks.  Too many options,
too many ways to mess something up.

Matthew Fredrickson