Hi, I have installed FS 1.6 on server. I registered two extensions from two different network. My server is on public IP. When I call calling on extension between each other, in FS log its showing ringing but at caller side its silent and also no ring at other end. Pleased advice. I did some changes sofia:- ext-rtp-ip=auto-nat ext-sip-ip=auto-nat to ext-rtp-ip=Public-IP ext-sip-ip=Public-IP Below is my of sofia status profile internal and sofia status profile external [root@192 sip_profiles]# fs_cli -rx "sofia status profile internal" ================================================================================================= Name internal Domain Name N/A Auto-NAT false DBName sofia_reg_internal Pres Hosts Public-IP,Public-IP Dialplan XML Context public Challenge Realm auto_from RTP-IP Public-IP SIP-IP Public-IP URL sip:mod_sofia@Public-IP:5060 BIND-URL sip:mod_sofia@Public-IP:5060;transport=udp,tcp WS-BIND-URL sip:mod_sofia@Public-IP:5066;transport=ws WSS-BIND-URL sips:mod_sofia@Public-IP:7443;transport=wss HOLD-MUSIC local_stream://moh OUTBOUND-PROXY N/A CODECS IN OPUS,G722,PCMU,PCMA,GSM CODECS OUT OPUS,G722,PCMU,PCMA,GSM TEL-EVENT 101 DTMF-MODE rfc2833 CNG 13 SESSION-TO 0 MAX-DIALOG 0 NOMEDIA false LATE-NEG true PROXY-MEDIA false ZRTP-PASSTHRU true AGGRESSIVENAT true CALLS-IN 2 FAILED-CALLS-IN 0 CALLS-OUT 2 FAILED-CALLS-OUT 1 REGISTRATIONS 7 [root@192 sip_profiles]# fs_cli -rx "sofia status profile external" ================================================================================================= Name external Domain Name N/A Auto-NAT false DBName sofia_reg_external Pres Hosts Dialplan XML Context public Challenge Realm auto_to RTP-IP Public-IP SIP-IP Public-IP URL sip:mod_sofia@Public-IP:5080 BIND-URL sip:mod_sofia@Public-IP:5080;transport=udp,tcp HOLD-MUSIC local_stream://moh OUTBOUND-PROXY N/A CODECS IN OPUS,G722,PCMU,PCMA,GSM CODECS OUT OPUS,G722,PCMU,PCMA,GSM TEL-EVENT 101 DTMF-MODE rfc2833 CNG 13 SESSION-TO 0 MAX-DIALOG 0 NOMEDIA false LATE-NEG true PROXY-MEDIA false ZRTP-PASSTHRU true AGGRESSIVENAT false CALLS-IN 0 FAILED-CALLS-IN 0 CALLS-OUT 0 FAILED-CALLS-OUT 0 REGISTRATIONS 0 *I changed my server IP with Public-IP for security. * Thanks Uday. -- Thanks & Regard Uday Site:- www.shareyourknowledge.in Mobile:- +91-9377579349