Simcom- SIM900

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).
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 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: -30C to +80C
Restricted operation: -40C to -30C and +80 C to +85C
Storage temperature -45C to +90C
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