On 05/21/2011 09:24 AM, Juha Heinanen wrote: ....more like whatever 'engine' is processing the RTP. Ptime states the sample size (20ms / 30ms) Jeremy McNamara

On 05/22/2011 03:34 PM, hala alramli wrote: Yes, but what I think others are trying to tell you with their replies is that this is not an appropriate task for a SIP proxy. One cannot simply alter SDP payloads mid-stream in this precise way; it is up to the endpoints to negotiate a mutually suitable ptime. The SIP proxy deals with signaling only. If the proxy modifies the ptime attribute in the SDP offer of A and passes it onto B, and B sends an answer agreeing on a different ptime than A sent, this will cause either undefined or otherwise undesirable behaviour in A. Do you see the problem? A proxy cannot just force issues that are fundamentally at the discretion of the two UAs and are up to them to negotiate amongst themselves. You need to set the media/bearer side of your installation (i.e. your media gateway) to support 20 ms ptime, and that's all there is to it. -- Alex Balashov - Principal Evariste Systems LLC 260 Peachtree Street NW Suite 2200 Atlanta, GA 30303 Tel: +1-678-954-0670 Fax: +1-404-961-1892 Web: http://www.evaristesys.com/