SIMCom presents a  compact and reliable wireless module-SIM900B which is compatible with the module-SIM300/340 and SIM340E. This is a complete Quad-band GSM/GPRS module in a B2B type and designed with a very powerful single-chip processor integrating AMR926EJ-S core, allowing you to benefit from small dimensions and cost-effective solutions.

Featuring an industry-standard interface, the SIM900B delivers GSM/GPRS 850/900/1800/1900MHz performance for voice, SMS, Data, and Fax in a small form factor and with low power consumption. SIM900B can fit almost all requirements in your M2M applications.

General features
* Quad-Band 850/ 900/ 1800/ 1900 MHz
* GPRS multi-slot class 10/8
* GPRS mobile station class B
* Compliant to GSM phase 2/2+
  – Class 4 (2 W @850/ 900 MHz)
  – Class 1 (1 W @ 1800/1900MHz)
* Dimensions: 40* 33 * 3 mm
* Weight: 7g
* Control via AT commands (GSM 07.07 ,07.05 and  
  SIMCOM enhanced AT Commands)
* SIM application toolkit
* Supply voltage range :3.2 ... 4.8V
* Low power consumption: 1.5mA(sleep mode)
* Operation temperature: -40 °C to +85 °C

Specifications for Fax
* Group 3, class 1

Specifications for Data
* GPRS class 10: max. 85.6 kbps (downlink)
* PBCCH support
* Coding schemes CS 1, 2, 3, 4
* CSD up to 14.4 kbps
* USSD
* Non transparent mode
* PPP-stack

Specifications for SMS via GSM/GPRS
* Point to point MO and MT
* SMS cell broadcast
* Text and PDU mode

Software features
* 0710 MUX protocol
* embedded TCP/UDP protocol
* FTP/HTTP( available at July ,2010)

Enhanced version add following features
* FOTA ( available at July ,2010)
* MMS (available at July ,2010)
* Embedded AT (available at Q3,2010)

Specifications for Voice
* Tricodec
  – Half rate (HR)
  – Full rate (FR)
  – Enhanced Full rate (EFR)
* Hands-free operation
  (Echo suppression)
* AMR
  – Half rate (HR)
  – Full rate (FR)

Interfaces
* 60 PIN Board-to-board connector
* Interface to external SIM 3V/ 1.8V
* Two analog audio interface
* RTC backup
* SPI interface
* Serial interface
* Embedded SIM (option )
* Embedded SIM  Holder (option )
* Keypad
* GPIO
* PWM
* ADC
* Antenna connector

Compatibility
* AT cellular command interface

Approvals(on going)
* CE
* FCC
* ROHS
* PTCRB
* GCF
* IC
* ICASA
* TA