FXS Gateway

FXS Gateway/Openvox


An FXS stands for foreign exchange subscriber.  FXS port is an interface device which connects station devices like phones or PBX to VoIP adapter. FXS has RJ11 port that connects internally to an analog office phone or fax machine. FXS port is connected with an analog DEVICE and the cable of the device will never leave the building.




As we discussed above, a telecommunication line from an FXO line port must be connected to FXS device so that the port after connection will work. Similarly, there is another line which comes from an FXS port and connects to FXO port for the connection to work. After when FXO port on your analog telephone is connected to the FXS port, you will receive (FXS) service and you hear a dial tone when you pick up the phone.


  • 8/16/24/32/40 FXS/FXO ports
  • CPU: 4 cores, 1.33GHz
  • RAM:1G
  • Network ports:2
  • USB port:1
  • Serial port:1
  • Reset Button:1
  • Storage temperature range: -20~70℃
  • Operation temperature range: 0~40℃
  • Operation humidity range: 10%~90% non-condensing
  • Power source: 100-240V/1-2A
  • Max Power Consumption: 60W
  • Dimension: 44cm × 4.5cm × 30cm
  • Weight: 3310g
  • FXS provides the Callback notification whenever the customer phone call becomes available. This feature is supported on analog SCCP endpoints.
  • It allows idle IP or analog phones that are connected to the same FXS ports.
  • The FXS ports allow users to configure AMWI only, VMWI only, or both.
  • The call waiting tone will play continuously whenever the called party has not switched to the new call and the new caller has not hung up.
  • FXS allows you to configure 1 to 4- FACs for accessing supplementary features.