Zycoo Mod 4 FXS

The Analog Station FXS board provides connectivity to standard analog phones. Typically, a phone is connected to a station interface and is, by default, in an on-hook state. When the phone goes off-hook, the phone completes the line circuit and current flows through the line.

The Analog Station Interface provides the following features:
Ring Generation and Ringing Trip
Loop Closure Detection
Loop Disconnect
Loop Reversal
Loop Voltage and Current Monitoring
On-hook and Off-hook Transmission
Hook-flash Detection
DTMF Signaling
Programmable Audio Gain
On-board Power Generation
Constant Loop Current: 20mA

Each port has one LED (Light-Emitting Diode), which is assembled on the main board.

The Green LED indicates port status:
Solid Green = Module loading successful
Blink Green = Channel Ringing
All four ports on ZYCOO 4FXS module bracket are 6P4C RJ11 ports.

The pin assignments are identified in the table below.

RJ11 Telco Port Connector

Note: Long term operation of FXS will cause some malfunction and affect the system reliability; to avoid any malfunction and assure reliable, the FXS module forced-air cooling is mandatory.