[asterisk-users] Different codecs for reading and writing

[Elliot Murdock]

Hello Everyone!

Thank you for all the information.

I am wondering how the Asterisk community has been working on
solutions to deal with the asymmetric quality of ADSL.   Voip is
becoming popular and a bottleneck does exists on the ADSL upload side.

Elliot

On Sun, Aug 2, 2009 at 3:17 PM, Kevin P. Fleming<kpfleming at digium.com> wrote:
> Tim Panton wrote:
>
>> The protocol expects the 2 ends to agree a single symmetrical codec
>> as part of the connection setup, but it doesn't define what actually
>> happens
>> if the codec specified in the first (full frame) voice packet isn't what
>> was agreed.
>
> Asterisk only supports symmetric codec configuration on its internal
> channels, so in Asterisk's IAX2 implementation, if a frame is received
> from the other endpoint that is not in the 'expected' format a warning
> is issued and the outbound direction is automatically switched to the
> same format. The same is done for any protocol using RTP in Asterisk.
>
> --
> Kevin P. Fleming
> Digium, Inc. | Director of Software Technologies
> 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
> skype: kpfleming | jabber: kpfleming at digium.com
> Check us out at www.digium.com & www.asterisk.org
>
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