• Tri-band GSM/GPRS (900/1800/1900 MHz) terminal
  • Based on Simcom SIM900 module
  • RS232 DCE serial interface
  • LED power supply indication
  • LED GSM network indication
  • SMA 50Ω antenna connector
  • Wide power supply range 8 to 30V DC
  • Desktop aluminum case
  • DIN 35mm rail mounting capability



DECODE GT900 is compact tri-band GSM/GPRS terminal which enables easy connection of user devices and PCs on GSM network. It is based on Simcom SIM900 module with integrated TCP/IP stack. Communication connector is standard DB-9 female plug with RS232 DCE interface. Antenna is connected on female SMA 50Ω connector. LED diodes on front panel indicates presence of power supply and GSM network. Device has wide power supply range, from 8 to 30V DC. GSM antena, RS232 cable, power supply foresaw for connecting to 220V AC socket i CD with user manual are included in package. Device is deleivered in desktop case, whilst by adding an optional adapter it can be mounted on DIn 35mm rail.


DECODE GT900 terminal manages communication connection of electronic devices and systems over GSM network by using GPRS, CSD and SMS services. It is especially designed for remote convey and control of industrial processes, security systems, POS terminals, level indicators (gas, water, electricity...).

It can be used for:

  • remote PLCs reading and control
  • remote process convey
  • paying on POS (point-of-sale) terminals
  • vending machine convey
  • traffic control
  • device service and maintenance
  • alarm systems


Best conditions of delivery and payment, as well as dealer discounts, can be obtained from our Sales Department. E-mail contact: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

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Technical specifications
GSM Simcom SIM900; Tri-Band EGSM 900, DCS 1800, PCS 1900 MHz; Compliant with 3GPP GSM Phase 2/2+ standard; Multiplexed RS232 interface; AT command interface; Power saving mode
GPRS Class 10 (sending upto 42.8Kbps, reception upto 95.6Kbps)
CSD 2400, 4800, 9600, 14400 bps
SMS Sending: MO (mobile originated), supported PDU and text mode; Reception: MT (mobile terminated), supported PDU and text mode; CBM (cell broadcasting message); SMS status report according to 3GPP TS 23.40
FAX Group 3, class 1
Additional capability Phonebook; Call diverting; Multiparty; Real time clock, timer
Output power Class 4 (2W at 900MHz); Class 1 (1W at 1800/1900MHz)
SIM card Mini SIM, 1.8V/3.0V
Serial interface RS232 ITU-T V.24 / V.28, DCE configuration, DB9 female
Serial baud rate 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 bps; 1 start bit; 7 or 8 data bits; Odd, Even and Non parity; 1 or 2 stop bits
Antenna connector SMA female, GSM 50Ω antenna with 3m cable included
LED indication green – Power ON, red – GSM ON
Power supply DC power supply, from 8 to 30V
Power supply connector Pluggable screw clamp, 2.5mm2
Power supply included 12V DC, 500mA max
Power consumtion Standby 0.2W, max 2.5W
Dimension 86 x 57 x 26 mm (without connection blocks)
Weight cca 100g
Protection IP40
Temperature range -20°C to +75°C, 0 to 95% RH (non condensed)
Mounting Desktop case; DIN 35mm rail mounting capability (optional adapter)