Front Panel

LEDIndicationStatusDescription
POWERPower statusOnThe power is switched on.
OffThe power is switched off.
SYSTEMSystem statusBlinkingThe system is running properly.
Static/OffThe system goes wrong.
WANWAN statusStaticLinked normally.
BlinkingIn communication.
OffOff-line.
LANLAN statusStaticLinked normally.
BlinkingIn communication.
OffOff-line.
1-4

(Telephony ports)

FXSGreen: staticThe analog phone is idle.
Green: blinkingThe analog phone is busy.
GSM/3G/4GRed: staticThe GSM/3G/4G Trunk is idle.
Red: blinking slowlyNo SIM card.
Red: blinking rapidlyThe GSM/3G/4G trunk is in use.
BRIOrange: blinkingThe BRI line is disconnected.
Orange: staticThe BRI line is connected or in use.
FXORed: staticThe PSTN line is idle.
Red: blinking slowlyNo PSTN line is connected to the FXO port.
Red: blinking rapidlyThe PSTN line is busy.

Rear Panel

PortDescription
RJ11
  • FXO port (red light): For the connection of PSTN lines or FXS ports of traditional PBX.
  • FXS port (green light): For the connection of analog phones.
  • BRI port (orange light): For the connection of ISDN BRI lines.
Note: The sequence number of the ports corresponds to that of the Indicator lights in the front panel. (I.e. the LED lights in the front indicate the connection status of the corresponding ports at the back panel.)
WAN/LAN

Yeastar S20 provides two 10/100Mbps adaptive RJ45 Ethernet ports, and supports 3 Ethernet modes. The default mode is “Single”.

  • Single: LAN port will be used for uplink connection. WAN port is disabled.
  • Bridge: LAN port will be used for uplink connection. WAN port will be used as bridge for PC connection.
  • Dual: Both LAN and WAN ports can be used for uplink connection.
TF SlotInsert TF card to store auto recording files.
Antenna SocketRotate the antenna into the Antenna Socket.
Reset ButtonPress and hold for 10 seconds to restore the factory defaults.
Power InletConnect the supplied power supply to the port.