[Asterisk-Users] Codec negotiation

[Mark Eissler]

The codec is selected by asterisk depending upon the codecs that you 
have allowed for the particular channel context and your setting of the 
bandwidth= parameter.

It would be nice if you could set things up so that an inbound call 
could force * to a higher bandwidth codec when needed (for example, an 
inbound fax call, let's say) but AFAIK this is not possible.

-mark

On Jan 25, 2005, at 10:18 AM, <niels at wxn.nl> wrote:

>
> Hello
>
> On every Incoming SIP and IAX call I see the following in asterisk
> debug:
>
> Accepting AUTHENTICATED call from 10.10.10.10, requested format = gsm,
> requested prefs = (), actual format = g729, my prefs =
> (g729|gsm|g723|g726|ulaw|alaw) priority = mine
>
> The problem is that the codec preference on both parties is different
>
> The calling party has preference gsm/g729/etc
> The called party (the one you see this debug from) has preference
> g729/gsm/etc
>
> The problem is.. This call is now set up with G729... And I want it
> rather to be decided by the callING party (thus want the call to be
> negotiated GSM)
>
> What can I do about this? (I just want that if I receive a call the
> calling party decides the codec, and not my side)
>
> My IAX.conf and SIP.conf have the following allow settings now
>
> Allow=all
> Allow=g729
> Allow=gsm
> Allow=ulaw
> Allow=alaw
>
>
> Help :-)
>
>
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--
Mark Eissler, mark at mixtur.com
Mixtur Interactive, Inc. - at - http://www.mixtur.com