Hi Iñaki, thanks alot for the pointer, did a quick search for onreply_route and found this article: http://www.voip-info.org/wiki/view/OpenSER+And+Mediaproxy By using the route from this example and fixing it to use mediaproxy in all situations I finally have my RTP routing via the mediaproxy box! :D I still have to read up on the onreply_option to fully understand it. Perhaps if this is something that is always required referenec to it should be added to the mediaproxy module documentation?? Thanks again! Cheers Andy. in 180/183/200 reply, so MediaProxy doesn't work at all. ________________________________________________ Message sent using UK Grid Webmail 2.7.9