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: 3.1...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
* SIM Card
- Option1: SIM holder
- Option2: Embeded SIM
* Keypad
* GPIO
* PWM
* ADC
* Antenna connector