Re: [Astlinux-users] Astlinux 0.3.0 can i use DTMFMODE=rfc2833 , info or inband i use only the codec ulaw and alaw (G711).

[Kristian K. <kri...@gm...>]

On 3/1/07, nedi <ne...@gm...> wrote:
> Hi all
> I get for my gsm gateway new firmware and the new firmware  have choice
> DTMFMODE=rfc2833, info or inband.
> can I use in Astlinux 0.3.0  DTMFMODE=rfc2833, info or inband i use only the
> codec ulaw and alaw (G711).
>
> Before firmware upgrade I used DTMFMODE=rfc2543, now I can't use it.
>
> Thanks.
>

Nedi,

  If you are using alaw or ulaw you can use any dtmfmode that is
supported by both (or all) of your endpoints.

  If you are using a compressed codec you can only use info or
rfc2833.  rfc2833 seems to be more popular these days because it
follows the RTP path with the audio, not the signalling as with INFO.
I myself prefer rfc2833.

  RFC 2543 is the old specification for SIP.  The new one is RFC 3261.
 Either way they are not a DTMF mode and are not valid as a dtmfmode
configure option in Asterisk.

-- 
Kristian Kielhofner