mediaproxy and rtpproxy are codec-agnostic. They only transmit what they receive (yes, also video). The peers negotiate the codec. You need to make sure that a) the PSTN GW supports the codec you want to use and b) the UA requests the codecs in such a order that the one you want is selected (see SDP payload of the INVITE/OK).
g-)

Benjamin.George@t-systems.com wrote:

Hi,

In my understanding, you can’t configure media proxy for g729 as it won’t support g729 codec. It is a patented codec and SER media proxy as well as SEMS supports only the patent free codecs like g711a/u or iLBC, etc. As a result of this you will get some choppy sound only if you use g729. So I feel, you have to modify the code in order to incorporate g729 with media proxy.

Regards,

Benjamin.

From: serusers-bounces@lists.iptel.org [mailto:serusers-bounces@lists.iptel.org] On Behalf Of ravi reddy
Sent: Wednesday, June 21, 2006 1:02 PM
To: serusers@lists.iptel.org
Subject: [Serusers] How to change Mediaproxy codec g-711a to g-729 or g-723

Hi ,
           I am using ser-0.9.6 and mediaproxy-1.4.2 and the are working fine til now but when i use the sip-sip phone (or) sip - pstn in the peak hours i cant hear voice very clearly its choppy sound ,

             when i tried to call grandstream sip phone to pstn i made grandstream phone to use only g-729 but mediaproxy is showing session in active

can any body tell me how to change mediaproxy's g-711a to some thing like g-729 or g-723 so that i can hear clear voice in peak hours too

                   thanks you very much

regards
ravi.
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