Is it a limitation of IAX or Asterisk?

I know Opal has this capability for RTP calls. Actually, in Opal codec
negotiation is independent for each direction.


Tom Moore wrote:

> I don't think that you can have different codecs in different directions on
> a single call.
>
> Tom
>  
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Magdy Salama
> Sent: Friday, May 02, 2008 9:58 AM
> To: [email protected]
> Subject: [asterisk-users] Asymmetric codecs in IAX2 trunk
>
> I'm trying to implement the following setup:
>
>
> Internet ---RTP--->Asterisk1----IAX-trunk-over-VPN---->Astrisk2---->PSTN
>
>
> The outbound bandwidth at asterisk2 (PSTN) is limited and expensive, so 
> I want to keep it low as possible. I want to use Speex VBR for the 
> outbound stream and keep the inbound stream at G.711 in the IAX2 trunk. 
> Speex streem will be transcoded to G.711 at Astreisk2.
>
>
> My question is: Does IAX2 trunk support asymmetric codecs (different 
> codec at each direction)?
>
>
> regards,
>
>
> Magdy Salama
>
>
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