[Asterisk-Users] dtmfmode=inband with G.729

[Eric Wieling]

It's not asterisk, its the codecs.  Codecs other than ulaw and alaw will
distort continuous tones like DTMF.

On Fri, 2004-04-02 at 08:22, Jim Rosenberg wrote:
> It appears Asterisk can handle DTMF inband on only a limited selection of
> formats, of which G.729 is not one. The issue appears to be something
> involving "short data" -- whatever that is. (I'm inferring all this from
> looking at dsp.c in the vicinity of the error message I was getting, which
> pointed to line 1424.)
> 
> What *is* "short data"? Is this really a show-stopper for the G.729 format,
> or is it just a case that nobody coded this?
> 
> I know that RFC 2833 is really a better way to go (this is for h323, so
> there is no option dtmfmode=info ...) but I'm not getting that to work. (I
> need to change firmware on my Cisco routers to get them to grok rfc2833.)
> 
> -T.i.A., Jim
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-- 
          Eric Wieling * BTEL Consulting * 504-899-1387 x2111
"In a related story, the IRS has recently ruled that the cost of Windows
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