S20 Overview

Front Panel

Table 1. Descriptions of S20 Front Panel
LED Indication Status Description
POWER Power status On The power is switched on.
Off The power is switched off.
SYSTEM System status Blinking The system is running properly.
Static/Off The system goes wrong.
WAN WAN status Static Linked normally.
Blinking In communication.
Off Off-line.
LAN LAN status Static Linked normally.
Blinking In communication.
Off Off-line.
1-4

(Telephony ports)

 FXS Green: static The analog phone is idle.
Green: blinking The analog phone is busy.
GSM/3G/4G Red: static The GSM/3G/4G Trunk is idle.
Red: blinking slowly No SIM card.
Red: blinking rapidly The GSM/3G/4G trunk is in use.
BRI Orange: blinking The BRI line is disconnected.
Orange: static The BRI line is connected or in use.
FXO Red: static The PSTN line is idle.
Red: blinking slowly No PSTN line is connected to the FXO port.
Red: blinking rapidly The PSTN line is busy.

Rear Panel

Table 2. Descriptions of S20 Rear Panel
Port Description
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 Slot Insert TF card to store auto recording files.
Antenna Socket Rotate the antenna into the Antenna Socket.
Reset Button Press and hold for 10 seconds to restore the factory defaults.
Power Inlet Connect the supplied power supply to the port.