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Picture of Car / Boat Security and Tracking System for GSM / GPRS Modem

Tri-band 900/1800/1900MHZ



GM-22 is a ready-to-use Tri-band GSM/GPRS Modem for voice, data, fax, and SMS services. It also supports GPRS (class 4) for high speed data transfer. GM-22 can be easily controlled by using AT command for all kinds for operation. With standard 9-pin RS-232 port and telephone-like audio plug the GM-22 can be set up without too much effort.


BANDEGSM 900/DCS 1800/PCS 1900MHz
Phase 2+ compliance
GPRS class 4
class B
Max 3 downlink,1 uplink, max 4 slot
Support Voice, Data, Fax, and SMS
AT Command Set
Power Operation Voltage12 V DC ± 10%
Power ConsumptionSpeech mode: 230mA (min), 260mA (max)
Standby mode: < 6mA(paging rate 2), < 3mA(paging rate 9) at GSM 900MHZ
GPRS: 250mA (max)
Dimension 98 x 72 x 32 (mm)
Weight100 (g)
Temperature RangeOperation: -20°C ~ 55°C
Storage: -30°C ~ 70°C
InterfacesSIM holder
15 pin sub-D connector (serial and audio connection)
4-pin power supply connector (micro-Fit)
SMA antenna a connector (50 chm)


* Wireless reporting system
* Wireless PSTN
* Mobile Trunk
* Car phone/ Telematics
* Wireless Terminal
* Alarm/ Security System
* Remote Control


* GSM Tri-band 900/1800/1900MHZ antenna
* Y Cable (including sub-D (15 -> 9) and RJ11 phone plug)
* Power Adaptor (110 ~ 240VAC)