Detailed Product Description

Prouduct Description:

GSM/GPRS/GPS Modem

Model G-548R

General features:

Industrial design

Aluminum casing

Wireless access to internet

Based on Simcom module SIM548Z

850/900/1800/1900MHZ

SIM Application Toolkit

RS232 interface for GSM/GPRS

RS232 interface for GPS(SiRF output)

RS232 interface for GPS(NMEA output)

RJ11 interface for phone

3-meter GSM antenna with glued stand

3-meter GPS antenna with magnetic stand

Output Power
Class 42W @ 850/900MHz
Class 11W @ 1800/1900MHz
Input voltage12V-36V DC
Input current1A-2A

Standby current: 96mA

Working current: 150-250mA
Working temperature -20 -+55

Storage temperature:-25 -+70

Size103*65*28mm
Weight170g

Accessories: AC/DC adaptor, 2 RS232 data cable, GSM antenna, GPS antenna, CD

GSM/GPRS specifications:

850/900/1800/1900MHz

GPRS class 10

GPRS mobile station class B

Compliant to GSM phase 2/2+

Control via AT commands (GSM 07.07 and 07.05 and SIMCOM enhanced AT commands)

Specification for SMS via GSM and GPRS:

Point to point MO and MT

SMS cell broadcast

Text and PDU mode

Specifications for audio

Tricodec: HR, FR, EFR

Hands-free operation

Echo suppression

Specifications for data transfer

GPRS class 10

Max. 85.6kbps(downlink)

PBCCH support

Coding schemes CS1,2, 3, 4

CSD up to 14.4kbps

USSD

Non transparent mode

PPP stack

Integrated TCP/IP stack

Specifications for fax

Group 3, class 1.

Specifications for GPS:

Receiver 20 channels, L1 1575.42 MHz, C/A code 1,023MHz chip rate

Accuracy Position 10 m CEP,

    without SA/Velocity 0.1m/s,

    without SA/Time 1μs synchronized to GPS time

DGPS accuracy 1 to 5m, typical, 0.05m/s, typical

Date WGS-84

Acquisition rate

    (TTFF defined at 95% of first position local station)

    Hot start < 1s, average, open sky

    Warm start < 38s, average, open sky

    Cold start < 42s, average, open sky

Operating voltage 3.3V DC ±5%

Low power consumption about 200mW at 3.3V

Protocols

     NMEA-0183

     SiRF binary

     RTCM SC-104

Crystal oscillator (TCXO), temperature compensated with frequency stability of ±0.5ppm

Memory: On-chip 4MB FLASH and 1 MB SRAM