The SIM900A is a complete Dual-band GSM/GPRS module in a SMT type which is designed specially for Chinese market, allowing you to benefit from small dimensions and cost-effective solutions.
Featuring an industry-standard interface, the SIM900A delivers GSM/GPRS 900/1800MHz performance for voice, SMS, Data, and Fax in a small form factor and with low power consumption. With a tiny configuration of 24mm x 24mm x 3 mm, SIM900A can fit almost all the space requirements in your applications, especially for slim and compact demand of design.
General features
* Dual-Band 900/ 1800 MHz
* GPRS multi-slot class 10/8
* GPRS mobile station class B
* Compliant to GSM phase 2/2+
– Class 4 (2 W @900 MHz)
– Class 1 (1 W @ 1800MHz)
* Dimensions: 24*24*3 mm
* Weight: 3.4g
* 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
* Interface to external SIM 3V/ 1.8V
* analog audio interface
* RTC backup
* SPI interface
* Two Serial interfaces
* Antenna pad
* I2C
* GPIO
* PWM
* ADC
Compatibility
* AT cellular command interface
Certificates:
* ROHS
* TA
* REACH
