I cannot receive calls or make calls using my PSTN line that is connect to my SPA3102 (LAN192.168.176.2) My 3CX server is on LAN:192.168.176.146 ; I can make internal extension calls. The 3CX line status for all extensions (including the SPA extention) ae showing as registered (green) and idle. The PSTN line (10000) 6868808 is showing as registered (idel) and green. This is my PSTN line configuration of 3CX: External number: 6868808 Internal number: 10000 Outbound Caller ID: 6868808 Allow outbound calls: Yes Allow incomming calls: Yes Answer After: 0 Authentication ID: 10000 Pass: 10000 Route inbound call to Ext.100 On the SPA3102, the PSTN Line is showing as registered. When I call the PSTN line from my mobile it just rings out. The information on the SPA3102 shows that the call is being received. It shows up my mobile number as being the last number to call so I know that the SPA3102 is getting the call. However, it does nothing with the call. I have set-up dial plan as S0:10000 and made sure I have referenced this dial-plan. The following is taken from SPA3102 information page: PSTN Line Status Hook State: On Line Voltage: 56 (V) Loop Current: 0.0 (mA) Registration State: Registered Last Registration At: 1/1/2003 12:28:06 Next Registration In: 1 s Last Called VoIP Number: Last Called PSTN Number: Last VoIP Caller: Last PSTN Caller: , 0862853886 Last PSTN Disconnect Reason: PSTN Activity Timer: 30000 (ms) Mapped SIP Port: 5060 Call Type: Yahoo!: VoIP State: Idle PSTN State: Idle When I made an outgoing call from extension 100, I dial 96868880 and I get a timeout error. I have included the server logs below for the various actions. Note that when I try to call the PSTN that the 3CX server does not log anything. That is, the SPA3102 does not appear to be trying to connect to the 3CX server at all. SPA3102 Sip Settings Sip Transprt UDP Sip Port 5060 SIP 100REL Enable Yes EXT SIP Port 5060 Auto Resync Reboot Yes SIP Proxy Require <Blank> SIP Remote Party ID Yes SIP GUID Yes I have read and configured all settings as per useful guides posted here but am at my wits end!