[Asterisk-Users] G729, x-pro, and codec ordering

[Paul Fielding]

----- Original Message ----- 
From: "Eric Wieling aka ManxPower" <eric at fnords.org>
> You can always allow both codecs and this only allow the codec you want in 
> X-Pro.  Asterisk won't try to use ulaw if the phone says it doesn't allow 
> ulaw.

what I'd like to do is be able to switch between G729 and ulaw.   if I allow 
only those two codecs, the problem I have is what I mentioned previously 
(see below), and I can't select which codec I want to use.  The goal is to 
pick the codec depending on whether I'm in a high bandwidth or low bandwidth 
environment....

regards,

Paul


From: "Paul Fielding"
> I have two g729 licenses.  I'd like to be able to get asterisk to use g729
> (via x-pro) only when I want to, reason being that if I'm in a high
> bandwidth environment I'd rather have the higher quality of ulaw, but when
> I'm in a low bandwidth environment I'd like to select g729.
>
> There doesn't seem to be much rhyme or reason to which codec gets chosen,
> and it seems to vary depending on whether the call is outgoing or 
> incoming.
>
> And furthermore, turning off a codec in x-pro doesn't seem to do anything.
> For example, if I have:
>
> [general]
> disallow=all
> allow=g729
> allow=ulaw
> allow=alaw
> allow=gsm
> allow=ilbc
>
> and then dial out on x-pro, G729 is selected.   Then I turn off G729 and
> turn on g711u  (I make g711u the only black codec on the x-pro display),
> then make a call, the call is still made using G729.
>
> Further more, with the same settings if I call from a zap channel to the
> x-pro sip extension, the codec chosen is g711u, even though I might only
> have g729 enabled on x-pro, and even though g729 is the first one on the
> list above.