Awesome thanks Mitch, I'll give that a blast. Thanks for the advice, I'll reply with how I get on in a bit -----Original Message----- From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org] On Behalf Of Mitch Capper Sent: 29 March 2012 03:03 To: FreeSWITCH Users Help Subject: Re: [Freeswitch-users] Registration VIA TCP Rob this is related to FS-3877 (Reuse TCP connection for both directions) freeswitch will attempt to establish a TCP connection back to the sip phone when sending it that incoming call and that is not working causing the failure would be the best guess. Ensuring the proper contact port may allow it to reuse this connection and not try to create this reverse connect, but otherwise ensuring the FS server can properly connect back to the client will probably solve it. Crank sofia loglevel should show the exact issue. ~Mitch _________________________________________________________________________ Professional FreeSWITCH Consulting Services: consulting@freeswitch.org http://www.freeswitchsolutions.com FreeSWITCH-powered IP PBX: The CudaTel Communication Server http://www.cudatel.com Official FreeSWITCH Sites http://www.freeswitch.org http://wiki.freeswitch.org http://www.cluecon.com FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org