... The FXO port is used to connect to PSTN while FXS port is used to connect to your normal phone ... normal phone. 2. Working PC, x-lite runs on this computer act as a sip extension. 3. Any ... 2A Port: 8FXO, 1RJ45 (10/100M) Protocol: SIP (based on Asterisk) Storage Temperature: -10 to 65oCHumidity: 10% to 90% ... Russian Spanish Portuguese IP PBX,PABX-8FXO,Based on Asterisk,Support voip sip IP PBX,PABX-8FXO, ...