It is a 8 channels GSM Gateway that has 8 ports FXS interfaces.
It can connect with ordinary telephone set,PBX or VOIP Gateway,call back system etc.
Dialing tone frequency:450hz
Employ Industrial module (M10) to make
SIM card supported (1.8V, 3V)
Caller ID display
The RJ-11 socket which connect the phone or billing system for metering purpose
Antenna socket (SMA)
Working status indicator
Signal Strength indicator