[asterisk-users] codecs/voicemail/DTMF

Eric "ManxPower" Wieling eric at fnords.org
Tue Sep 19 10:33:30 MST 2006

Use type=user for inbound and type=peer for outbound.  Have different 
codec settings for each of them.

Mr. Jones wrote:
> Hi Folks,
> We're trying to roll Asterisk out to production and are having a few
> complications.
> Most specifically we have G711 for our inbound origination, but would
> prefer G729 for outbound termination, so far so good - it appears that
> dtmfmode=auto works in both cases.
> The area I'm having trouble with is, in order to have g729 on the
> outbound I have:
> disallow=all
> allow=g729
> allow=ulaw
> allow=alaw
> In sip.conf at the [general] level.
> When we call voicemail, or the auto attendant internally touchtones
> don't work and we get:
> WARNING[8393]: dsp.c:1422 ast_dsp_process: Inband DTMF is not
> supported on codec g729. Use RFC2833
> I'm just guessing, but I thought "auto" was supposed to negotiate the
> DTMF mode. Since it appears that the voicemail can't handle RFC2833,
> is there some way to force the codec to resort to G711?
> Thanks!
> Brian
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