Hi Andrew,
All that happens is Asterisk sets up the call using G723 as the codec
and calls then fail due to transcoding problems (since it cannot
encode/decode g723). The softphone always prefers g723 over gsm, so if
you allow both in sip.conf Asterisk always select g723 due to the
preference of the client. What I need is for Asterisk to understand
what the 'other end' is capable of before selecting a codec. i.e. if the
call terminates to the Voicemail then select gsm and do NOT allow g723.
Codec negotiation is usually something that occurs in the call setup
between 2 endpoints, but Asterisk seems to do this in isolation for each
client without understanding where the call is going first to make that
decision. What I really need is something that forces the 'allow'
codecs in the dial plan per call. Does anybody know if this is this
possible?
Cheers,
Ray
Andrew Joakimsen wrote:
What happens if in your sip.conf you set
disallow=all
allow=g723,gsm
And then allow both codec in the phone?
On 11/19/06, *Ray Jackson* < [EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
All,
Our users have a softphone client that supports the G723 Codec
which we
want to use for bandwidth reasons, however we do not wish (or have the
funds) to license the codec on our Asterisk servers. We have G723
pass-through working between the clients just fine, however calls fail
when terminating with Asterisk itself (i.e. Voicemail) or out to the
PSTN due to transcoding issues.
If it possible to build the config into our Asterisk servers so that
calls between the softphones defaults to G723 pass-through, whilst
all
other calls (PSTN, Voicemail etc.) default to GSM as their preferred
codec? Is there a way of getting Asterisk to be smart with Codec
negotitation and figure out which codec the other end of the call is
capable of before negotitating back to the Softphone with the
selected
codec? I assume you would have to do something in the dial
plan? I saw
the SIP_CODEC variable, but couldn't make it work.
Any advice would be very welcome!
Cheers,
Ray
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