[Asterisk-Users] Automatic Codec change for different communication channels!?

David John Walsh
Tue, 31 May 2005 06:19:02 -0000

This is off the top of my head - never tested

For the end user device (ie polycom in your case) your sip settings
would be something like

[5000]
username=5000
<<SNIP>>
deny=all
allow=ulaw
allow=alaw
allow=G729

which would give you both

Then if you in the Trunk set the following

[Trunkroute]
username=asterisk2
<<SNIP>>
deny=all
allow=G729

Actually thinking some more, this might not work, as your asterisk box
may transcode it, although it might not - but even if my logic is
flawed here, it might inspire?

David

On 31/05/05, Kib Eki <kibeki@gmx.net> wrote:
> could you please give more information concerning this setting?
>
> Pavel Jezek wrote:
>
> > you can try use variable "preffered_codec" in dial command
(if you now
> > the prefixes/dial numbers, for which to use eg. g729)...
> > PJ
> >
> >
> >
> >
> >
> >
> > Kib Eki wrote:
> >
> >> Hi,
> >>
> >> I am looking for a way to let * choose the voice codec relying to
the
> >> used communication channel.
> >>
> >> Example
> >> I am using a Polycom 500 which supports G729 and G.711.
> >> When I am doing internal calls (with my LAN) or calls over the
PSTN
> >> (ISDN) I want to use the G.711 codec because there is enough
bandwith.
> >> When I am doing inter asterisk calls (over my WAN to another *
> >> server) I want to use G.729.
> >>
> >> Is there a way how i can achieve this?
> >>
> >> Kib
> >>
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