You'd probably have to do some tricks to get that to work if your SER is already set up for mediaproxy. By default, without mediaproxy and without NAT checks, this is exactly the way things would occur because all your machines would register with their internal IP and they'd just communicate directly with each other (as long as the origin and destination of the call were in the same network). If you add NAT checks to allow the UAs to speak to the outside world through a media proxy, though, there's no real way for the ser server to know if the internal IPs it's getting in its NAT checking are in the same subnet. You could probably set up some additional checks and add people in the same subnet to identical groups and what not, bypassing the mediaproxy if the UA is inviting a UA in the same group. It'd be rather convoluted, but workable. N. On Mon, 31 Oct 2005 18:40:13 +0300, deviator wrote