Modems, applications

RS-M3(4) GPRS Modem

Designed for global market, RS-M3(4) GPRS Modem is a Tri-band or Quad-band GSM/GPRS modem that works on frequencies GSM 850 MHz, GSM 900 MHz, DCS 1800 MHz and PCS1900 MHz. It can fit many space requirement in your application.
RS-M3(4) GPRS Modem includes a GSM/GPRS engine:SIM300 or SIM340 GSM/GPRS module produced by SIMCOM company.

Power saving:    

  • Typical power consumption in SLEEP mode to 3mA
Frequency bands:
  • RS-M4 Quad-band: GSM 850, GSM 900, DCS 1800, PCS 1900. The band can be set by AT COMMAND, and default band is EGSM 900 and DCS 1800.
  • RS-M3 Tri-band: GSM 900, DCS 1800, PCS 1900.
  • Compliant to GSM Phase 2/2+

GSM class:

  • Small MS

Transmit power:

  • Class 4 (2W) at EGSM900 and GSM850
  • Class 1 (1W) at DCS1800 and PCS 1900

GPRS connectivity:

  • GPRS multi-slot class 10
  • GPRS mobile station class B

Temperature range:

  • Normal operation: -20°C to +55°C
  • Restricted operation: -25°C to -20°C and +55°C to +75°C
  • Storage temperature -40°C to +80°C


  • GPRS data downlink transfer: max. 85.6 kbps
  • GPRS data uplink transfer: max. 42.8 kbps
  • Coding scheme: CS-1, CS-2, CS-3 and CS-4
  • Supports the protocols PAP (Password Authentication Protocol) usually used for PPP connections.
  • Integrates the TCP/IP protocol.
  • Support Packet Switched Broadcast Control Channel (PBCCH)

  • CSD transmission rates: 2.4, 4.8, 9.6, 14.4 kbps, non-transparent
  • Unstructured Supplementary Services Data (USSD) support

  • MT, MO, CB, Text and PDU mode
  • SMS storage: SIM card
  • Support transmission of SMS alternatively over CSD or GPRS. User can choose preferred mode.


  • Group 3 Class 1
  • SIM interface:
  • Supported SIM card: 1.8V ,3V

External antenna:

  • Connected via 50 Ohm SMA antenna connector
Serial GSM/GPRS interface:

  • Eight lines on Serial Port Interface
  • Can be used for CSD FAX, GPRS service and send AT command of controlling GPRS module.
Phonebook management:

  • Supported phonebook types: SM, FD, LD, MC, RC, ON, ME,BN,VM,LA,DC,SD

SIM Application Toolkit:

  • Supports SAT class 3, GSM 11.14 Release 98
Timer function:

  • Programmable via AT command

Firmware upgrade:

  • Firmware upgradeable over serial interface



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