Hi there, I have two FS servers (FS1 and FS2) behind an inbound OpenSIPS proxy. Outbound (terminating) traffic goes directly from each FS box. All my home office phones get calls no matter which box they are registered with or which box the call comes in on - thanks Anthony. However my SIP client on various iPhone/Androids etc only receive calls that originate on the box on which they are registered. Looking at the SIP trace - when the call comes in on the 'wrong' box, the invites to these SIP clients do not even get a response. Presumably because the 3G network has no idea who this new IP in the "from address" is, who trying to contact them. Question is, is there a way around this - our will I have start routing all terminating traffic out through the proxy also. Any insight appreciated. Thanks! Pj