Hi, Newbie here (again !) .... Hope someone here can help. I'm having a few NAT related issues and the sparse, sometimes out-of-date wikis on the freeswitch site are not helping.... ;-( My layout is as follows ... Freewitch Server .....**INTERNET**........[FIREWALL].....[BRIA 3 SOFTPHONE] (Public IP, No NAT) .......................................NAT..............Internal IP Firewall traversal method in Bria is set to "none" as I've no ICE/STUN/TURN server. Freeswitch is started with the -nonat -nonatmap options because it is on a public IP with no NAT. (1) Outbound Calls I can dial out. I can hear the remote end. The remote end cannot hear me. (2) Inbound Calls These do not work at all. Console output (excluding debug level messages, and with IP and Phone Numbers changed to protect the innocent) 2012-01-09 19:22:14.076501 [NOTICE] switch_channel.c:924 New Channel sofia/internal/02079460949@10.0.0.134 [3c4ec25c-3af7-11e1-96ae-155d65675ea5] 2012-01-09 19:22:14.076501 [INFO] mod_dialplan_xml.c:481 Processing 02079460949 <02079460949>->01174960949 in context public 2012-01-09 19:22:14.096468 [NOTICE] switch_ivr.c:1717 Transfer sofia/internal/02079460949@10.0.0.134 to XML[1000@default] 2012-01-09 19:22:14.096468 [INFO] mod_dialplan_xml.c:481 Processing 02079460949 <02079460949>->1000 in context default 2012-01-09 19:22:14.096468 [NOTICE] switch_channel.c:924 New Channel sofia/internal/sip:1000@10.14.2.2:48101 [3c4f8cb4-3af7-11e1-96b5-155d65675ea5] 2012-01-09 19:22:14.096468 [INFO] switch_nat.c:590 NAT port mapping disabled 2012-01-09 19:22:14.096468 [INFO] switch_nat.c:590 NAT port mapping disabled 2012-01-09 19:22:14.156503 [NOTICE] sofia.c:6246 Hangup sofia/internal/sip:1000@10.14.2.2:48101 [CS_CONSUME_MEDIA] [SERVICE_NOT_IMPLEMENTED] 2012-01-09 19:22:14.156503 [NOTICE] switch_ivr_originate.c:2459 Cannot create outgoing channel of type [user] cause: [SERVICE_NOT_IMPLEMENTED] 2012-01-09 19:22:14.156503 [INFO] mod_dptools.c:2900 Originate Failed. Cause: SERVICE_NOT_IMPLEMENTED 2012-01-09 19:22:14.156503 [NOTICE] switch_core_session.c:1398 Session 27 (sofia/internal/sip:1000@10.14.2.2:48101) Ended 2012-01-09 19:22:14.156503 [NOTICE] switch_core_session.c:1400 Close Channel sofia/internal/sip:1000@10.14.2.2:48101 [CS_DESTROY] 2012-01-09 19:22:14.156503 [NOTICE] mod_dptools.c:3019 Hangup sofia/internal/02079460949@10.0.0.134 [CS_EXECUTE] [SERVICE_NOT_IMPLEMENTED] 2012-01-09 19:22:14.176780 [NOTICE] switch_core_session.c:1398 Session 26 (sofia/internal/02079460949@10.0.0.134) Ended 2012-01-09 19:22:14.176780 [NOTICE] switch_core_session.c:1400 Close Channel sofia/internal/02079460949@10.0.0.134 [CS_DESTROY] The above would suggest I need to boot Freeswitch with NAT turned on ? But I'm confused as to why ? Because Freeswitch has no need to discover its public IP address. Thanks Bob