Providing 900mhz and 1800mhz GSM connectivity. 850mhz/1900mhz opation
Simple to install/easy to maintain
Allow PIN code entering and reciprocal phone-card lock
Provide optimized circuit directly connecting the exchange device for extensions
Polarity reversal signal for metering
3.5dBi gain antenna
Compatible to PABX, VOIP gateway, IP PBX, Call back system, cord phone, Voice system, and etc.
Suitable for call termination of ISP
450hz Dialing tone
DTMF Dialing
caller ID. with DTMF and FSK
provide accuracy polar inverse or 12k/16k hz signal for payphone
Hide calling out number.
Working state indicator
Signal Strength indicator

Air interface standard: GSM 900/1800 MHz Phase 2+
Frequency ranges:
GSM900:
Transmit: 890~915MHz;
Receive: 935~960MHz
GSM1800:
Transmit: 1710~1785MHz;
Receive: 1805~1880MHz
Channel space: 200KHz
Sensitivity: -104dB
Peak power consumption: 8W
Phone interface�Gsupply RJ-11 Phone Interface Hanging voltage: 48V.
Dialing tone Frequency�G450Hz
Operating environment requirements:
Temperature: 0�XC - +40�XC
Relative humidity: 45% - 90%
Connectors: SMA antenna connector
Atmospheric pressure: 86~106Pka
Power consumption: static? 100 mA, emission? 2000 mA
Antenna: Gain: 3.5dB (all directional) 12 dB(Certain/selection)
Power supply:
AC220V��10% 47-54Hz AC110V/60Hz( optional)
DC12V ( optional)