Simcom GSM/GPRS+GPS Module SIM908 is a complete Quad-Band  GSM/GPRS module which combines GPS technology for satellite navigation. The compact design which integrated GPRS and GPS in a SMT package will  significantly save both time and costs  for customers to develop GPS enabled applications.
Featuring an industry-standard interface and GPS function, it allows variable assets to be tracked seamlessly at any location and anytime with signal coverage.

General features

 Quad-Band 850/900/18001900MHz

GPRS multi-slot class 10

GPRS mobile station class B

Compliant to GSM phase 2/2+

  Class 4 (2 W  850/900 MHz)

  Class 1 (1 W 1800/1900MHz)

Control via AT commands (GSM 07.07 ,07.05   and SIMCom enhanced AT Commands)

 SIM application toolkit

 Supply voltage range:

    -GPRS: 3.2 ~ 4.8 V

    -GPS: 3.0 ~ 4.5V

 Low power consumption

 Dimensions: 30*30*3.2mm

 Weight:

  - SIM908:5.2g

  - SIM908-C:11.1g

Operation temperature: -40  to +85

 Specifications for SMS via GSM / GPRS

Point-to-point MO and MT

SMS cell broadcast

Text and PDU mode  

Specifications for audio

Tricodec

  - Half rate (HR)

  - Full rate (FR)

  - Enhanced Full rate (EFR)

Hands-free operation

Echo cancellation  

Specifications for data transfer

GPRS class 8/10: 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

Integrated TCP/IP stack  

Compatibility

AT cellular command interface   Specification for GPS

Receiver type

  - 42-channel

  - GPS L1 C/A code,

  - High-performance STE engine 

 Sensitivity

  - Tracking:               -160 dBm

  - Cold starts :           -143 dBm

 Time-To-First-Fix  

  - Cold starts:           30s (typ.) 

  - Hot starts:               1s (typ.)

 Accuracy

  -Horizontal position : <2.5m CEP

 Power consumption (GSM engine in idle mode)

  - Acquisition           77mA

  - Tracking               76mA

Interfaces

80-pad with SMT type

Interface to external SIM 3V/ 1.8V

Dual analog audio interfaces

SPI interface

RTC backup

Charge interface

A serial interface and a debug interface for  GSM/GPRS

Debug interface for GPS NMEA information output

Two separate antenna connectors for GSM/GPRS&GPS