Arik Raffael Funke wrote:
Hi,
it seems that there is a bug in asterisk's dtmf mode autodetection.
Assume following sip.conf:
[sipprovider]
disallow=all
allow=g726
dtmfmode=auto
DTMF does not work. It seems rfc2833 mode is chosen despite it being
obvious that this cannot work!
Why could it not work? While RFC2833 is carried over the RTP stream it
is not sent in the audio stream so it should work as long as the remote
end is using it.
The following configuration is necessary to get DTMF to work: dtmfmode=info
It's always best to specify the dtmfmode in use as it controls both
receiving and sending. The auto setting also does not encompass the info
DTMF option for sending.
In my opinion, this behaviour is counter-intuitive. I am using asterisk
1.2. In v. 1.4 does dtmfmode=auto still have the behaviour?
I do not believe it has been changed at all. If you have a method of
better determining things please feel free to share it.
Cheers,
Arik
Joshua Colp
Software Developer
Digium, Inc.
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