Reset Button: Pressing and holding this button for 10 seconds will restore the Yeastar S100 to its factory default settings.

System Indicator: This indicator light helps to show the system status. Blinking indicates that the system is working properly, while a static or off status may indicate a system malfunction.

Power Indicator: This indicator light shows the power status of the Yeastar S100.

SD Slot: The SD card slot allows you to insert an SD card for storing recording files, voicemails, or logs.

USB Slot: The USB slot allows you to insert a USB flash drive for storing recording files, voicemails, or logs.

WAN Port: The WAN port is used for connecting the Yeastar S100 to the Wide Area Network (WAN).

LAN Port: The LAN port is used for connecting the Yeastar S100 to the Local Area Network (LAN).

Console: The console port is used for connecting an RS232 line to debug the system.

Power Switch: This button is used to switch the Yeastar S100 on or off.

Power Inlet: The power inlet is where you connect the supplied power supply to the Yeastar S100.

Protective Earth: This connection is used to ground the system, reducing the risk of electrocution or protecting the PBX from external noise in the event of a lightning strike.

Antenna Socket: The antenna socket is used to connect an antenna to the Yeastar S100.