Special Order: Please Contact us for details. 


GPRS MODEM: Q2403A 900/1800M. Serial interface and takes your SIM card. Uses AT command set. Industrial enclosure with adjustable mounting tabs - or use a continuous piece of material that fits the tab slot. Can be mounted in vehicles or on machinery, etc. A remote antenna can be used with your cable. Includes a 12V DC power supply and serial cable. 2 year warranty. Please note: 900/1800 is primarily for Asia and Europe! We will get 850/1900 for US, Canada, and much of South America soon. If you bought a 900/1800 by mistake, we will exchange.

From Wikipedia:

GSM-900 and GSM-1800 are used in most parts of the world: Europe, Middle East, Africa, Australia, Oceania (and most of Asia). In South and Central America these countries use the following:

  • Costa Rica - GSM-1800
  • Brazil - GSM-850, 900, 1800 and 1900  (everything works here)
  • Guatemala - GSM-850, GSM-900 and 1900
  • El Salvador - GSM-850, GSM-900 and 1900
  • Colombia uses 850/1900

In North America, GSM operates on the primary mobile communication bands 850 MHz and 1900 MHz. In Canada, GSM-1900 is the primary band used in urban areas with 850 as a backup, and GSM-850 being the primary rural band. In the United States, regulatory requirements determine which area can use which band.

See More:  http://en.wikipedia.org/wiki/GSM_frequency_bands

Need docs? We are still sorting though them. The Sierra site has what you need.  

The two key sections are the "Open AT SDK All Devices" and the Q240x subfolder.  The chip set is the Q2403A. 






GSM/GPRS Modem, Wavecom chipset 2403A, Interface RS232






Industrial Design, Aluminum Casing

Based On

Based on WAVECOM Module Q2403A


900/1800 MHz, in compliance with ETSI GSM Phase2 + Standard


Wireless Access to internet

TCP/IP stack


AT Commands

Remote control GSM 07.07 & 07.05


DB-9 RS232 Serial Port

SIM Slot

3 Volt SIM Card slot 

GPRS Class

GPRS Class 8

Enhanced Functions

GPRS link detection and redial (works with Microsoft dialup software) Support dialup control

Transmitting Speed

Maximum Transmitting Speed 115.2 Kbps




Send and Receive SMS, Data, FAX, E-mail, Voice, MMS

Data Transfer

GPRS Class 8 (up to 85.6Kbps) Full PBCCH support GPRS mobile station, class B CSD up to 14.4Kbps USSD Non transparent mode V.110 Coding scheme CS1, 2, 3, 4


Point-to-point MO and MT SMS cell broadcast Text and PDU mode


Male SMA connector

Output Power

900MHz 2W (Class 4),  1800MHz 1W (Class 1)

Input Voltage

5V to 24 V DC

Input Current

1A to 2 A

Working Temp.

(-20C to +60C)


(-25C to +70C)






AC-DC Adapter, RS232 Cable, 2 mounting plates, Antenna