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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 (sim340) 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
Air interface standard: GSM850/1900Mhz, 900/1, 800Mhz phase 2+ full band
A) GSM 850 GSM 1900:
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