In the trunk definition you can specify which codecs are permitted for that
channel, for example...
disallow = all
allow = alaw
will force all traffic over that trunk to use alaw. For the extensions, if
you want to permit multiple codecs then, for example
disallow = all
allow = alaw,ulaw,gsm
I do not know if you will also need the codec negotiation patch as well.
Obviously you want to avoid conversion occurring inside the asterisk server
if you have a call coming in as g729 you want to pass it on to the extension
as g729 and not convert to ulaw/alaw or whatever in the server.
David
On Fri, Mar 26, 2010 at 4:29 AM, Dominko Vrljic <[email protected]>wrote:
> Hi,
> first let me explain my configuration:
> astlinux has ISDN PCI card and SIP trunk over ADSL.
> Extensions, analog phones, are connected to asterisk over Linksys PAP2T.
> My question is about codec. When I call local PSTN numners over ISDN
> asterisk should use alaw codec, but if I call someone over SIP trunk
> asterisk should use g729 codec. Both Linksys PAP2T and SIP trunk support
> g729 codec.
> Can this be achieved with the usual asterisk configuration or I should
> experiment with Asterisk Codec Negotiation Patch:
> http://www.b2bua.org/wiki/AsteriskCodecNegotiationPatch
>
> Regards
> Dominko
>
>
>
>
>
>
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------------------------------------------------------------------------------
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proactively, and fine-tune applications for parallel performance.
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