Number of Quad Band GSM channels per module – 1

External antennas – 1

SIM Cards – 1 total

External power supply required – No

Interoperable modules – 4FXO, 4FXS, 2FXOS, 4BRI, 1E1/T1 (PRI)

Supported protocols – Voice (2G), SMS

Accessibility through Asterisk 1.8x

Each port has one LED (Light-Emitting Diodes), which is assembled on the mainboard.

The Red LED indicates port status:

Solid Red = Module loading successful

Blink Red = Channel Ringing

If the LED is off, the GSM module is loading failure.

The Red LED indicates port status:

Solid Red = TE Model

The Green LED indicates port status:

Solid Green = NT Model

If the LED is off, the module is loading failure.

Loop Closure Detection

Loop Disconnect

Loop Reversal

Loop Voltage and Current Monitoring

On-hook and Off-hook T 

Hook-flash Detection

DTMF Signaling

Programmable Audio Gain