[Users] Re: MediaProxy Questions

[Adrian Georgescu]

On Nov 9, 2005, at 6:11 AM, Daryl Sanders wrote:

> Thanks for the info, and please forgive my ignorance on the subject...
>
> Is there a standard that ATAs uses for codec selection?

Yes SIP/SDP check the RFCs.

> Like everyone else, I want to make sure my ATAs (cisco, sipura,
> linksys) use only lower bandwidth codecs. I can guarantee that my
> ATA's and my PSTN gateways will all have g729 available, but I want to
> make sure that mediaproxy force a different codec emulation for any
> reason.

You cannot enforce any codec selection with MediaProxy, you can only  
limit/order the codecs in the PSTN gateway or your user agents.

>
> - Daryl
>
> On 11/9/05, Adrian Georgescu <ag at ag-projects.com> wrote:
>
>> Daryl,
>>
>> MediaProxy relays only RTP/RTCP packets irrespective of the codes
>> negotiated by the end points. So your endpoints select the codec
>> based on SDP offer/answer model and not MediaProxy.
>>
>> Adrian
>>
>>
>> On Nov 9, 2005, at 5:38 AM, Daryl Sanders wrote:
>>
>>
>>> How does mediaproxy select the codec to be used when multiple are
>>> present?
>>> Does it try to use the lowest bandwidth codec first?
>>> Is there any way to manipulate this so if it finds 3-4 codecs
>>> available, it will use the one specified?
>>>
>>> - Daryl
>>>
>>>
>>
>>
>