asterisk users - Feb 2006 - How can I force Asterisk t not override my codec order?

I've noticed the following situation:

In two softphones, I've configured the next codec order for each one

softphone 1: 1 - PCMA
              2 - GSM

softphone 2: 1 - GSM
              2 - PCMA

and in Asterisk, the order is:

disallow=all
allow=gsm
allow=alaw

If I call from softphone 1 to softphone 2, I presume that Asterisk 
should do transcoding (canreinvite is set to no):

softphone 1 <- PCMA -> Asterisk <- GSM -> softphone 2

But, strange for me, Asterisk forces both sides to GSM. I guess that 
this feature is done to avoid the problem of users setting always the 
more bandwith consuming codec against its administrator desires. 
However, is there a way to bypass this feature, so Asterisk set as codec 
order the same offered by the softphone? Something in sip.conf like:

use_client_codec_order = yes (no by default)???

Thanks a lot.

-- 
Atly.
Alvaro Palma

Actually no.

As far as I understand it, the receiving station gets to dictate the 
codec used. You call and offer up your list. He selects his preffered 
from your list and off you go.

in your case you will always have gsm from 1>2 becasue 2 has a 
prefference for GSM.

Try it back the other way. You should get an alaw connection

Mark, G7LTT/KC2ENI
Randolph, NJ
http://www.g7ltt.com


?lvaro Palma wrote:
> I've noticed the following situation:
> 
> In two softphones, I've configured the next codec order for each one
> 
> softphone 1: 1 - PCMA
>              2 - GSM
> 
> softphone 2: 1 - GSM
>              2 - PCMA
> 
> and in Asterisk, the order is:
> 
> disallow=all
> allow=gsm
> allow=alaw
> 
> If I call from softphone 1 to softphone 2, I presume that Asterisk 
> should do transcoding (canreinvite is set to no):
> 
> softphone 1 <- PCMA -> Asterisk <- GSM -> softphone 2
> 
> But, strange for me, Asterisk forces both sides to GSM. I guess that 
> this feature is done to avoid the problem of users setting always the 
> more bandwith consuming codec against its administrator desires. 
> However, is there a way to bypass this feature, so Asterisk set as codec 
> order the same offered by the softphone? Something in sip.conf like:
> 
> use_client_codec_order = yes (no by default)???
> 
> Thanks a lot.
>