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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 ARM926EJ-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.

Designed for global market, SIM900 is a quad-band GSM/GPRS engine that works on frequencies GSM 850MHz, EGSM 900MHz, DCS 1800MHz and PCS 1900MHz. SIM900 features GPRS multi-slot class 10/ class 8 (optional) and supports the GPRS coding schemes CS-1, CS-2, CS-3 and CS-4.

With a tiny configuration of 24mm x 24mm x 3mm, SIM900 can meet almost all the space requirements in your applications, such as M2M, smart phone, PDA and other mobile devices.

The physical interface to the mobile application is a 68-pin SMT pad, which provides all hardware interfaces between the module and customers' boards.

•The keypad and SPI display interface will give you the flexibility to develop customized applications.
•Serial port and Debug port can help you easily develop your applications.
•One audio channel includes a microphone input and a speaker output.

The SIM900 is designed with power saving technique so that the current consumption is as low as 1.5mA in SLEEP mode.

The SIM900 is integrated with the TCP/IP protocol; extended TCP/IP AT commands are developed for customers to use the TCP/IP protocol easily, which is very useful for those data transfer applications.

General features:
1.Power supply: Single supply voltage 3.4V - 4.5V
2.Power saving: Typical power consumption in SLEEP mode is 1.5mA ( BS-PA-MFRMS=5 )
3.Frequency Bands:
    •SIM900 quad-band: GSM 850,EGSM 900, DCS 1800, PCS 1900. The SIM900 can search the 4 frequency bands automatically. The frequency bands also can be set by AT command.
    •Compliant to GSM Phase 2/2+
4.GSM class: Small MS
5.Transmitting power:
    •Class 4 (2W) at GSM 850 and EGSM 900
    •Class 1 (1W) at DCS 1800 and PCS 1900
6.GPRS connectivity:
    •GPRS multi-slot class 10 (default)
    •GPRS multi-slot class 8 (option)
    •GPRS mobile station class B
7.Temperature range:
    •Normal operation: -30°C to +80°C
    •Restricted operation: -40°C to -30°C and +80 °C to +85°C
    •Storage temperature -45°C to +90°C
8.DATA GPRS:
    •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
    •SIM900 supports the protocols PAP (Password Authentication Protocol) usually used for PPP connections.
    •The SIM900 integrates the TCP/IP protocol.
    •Support Packet Switched Broadcast Control Channel (PBCCH)
9.CSD:
    •CSD transmission rates: 2.4, 4.8, 9.6, 14.4 kbps, non-transparent
    •Unstructured Supplementary Services Data (USSD) support
10.SMS:
    •MT, MO, CB, Text and PDU mode
    •MS storage: SIM card
11.FAX: Group 3 Class 1
12.SIM interface: Support SIM card: 1.8V, 3V
13.External antenna: Antenna pad
14.Audio features: Speech codec modes:
    •Half Rate (ETS 06.20)
    •Full Rate (ETS 06.10)
    •Enhanced Full Rate (ETS 06.50 / 06.60 / 06.80)
    •Adaptive multi rate (AMR)
    •Echo Cancellation
    •Noise Suppression
15.Serial port and Debug port: Serial Port:
    •8-wire modem interface with status and control lines, unbalanced,asynchronous.
    •1.2kbps to 11.52kbps.
    •Serial Port can be used for AT commands or data stream.
    •Supports RTS/CTS hardware handshake and software ON/OFF flow control.
    •Multiplex ability according to GSM 07.10 Multiplexer Protocol.
    •Autobauding supports baud rate from 1200 bps to 115200bps.
  Debug port:
    •2-wire null modem interface DBG_TXD and DBG_RXD.
    •Can be used for debugging and upgrading firmware.
16.Phonebook management: Support phonebook types: SM, FD, LD, RC, ON, MC.
17.SIM Application Toolkit: Support SAT class 3, GSM 11.14 Release 99
18.Real time clock: Implemented
19.Timer function: Programmable via AT command
20.Physical characteristics: Size: 24mm x 24mm x 3mm Weight: 3.4g
21.Firmware upgrade: Firmware upgrade by debug port  

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