Features:
It is a 4 channels GSM Gateway that has 4 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 (SIM340) to make
SIM card supported (1.8V, 3V)
Caller ID display
DTMF Dialing
Bell signal
Polarity reversal
The RJ-11 socket which connect the phone or billing system for metering purpose
Antenna socket (SMA)
IP Presetting.
Working status indicator
Signal Strength indicator