GSM9000 RF Solutions, GSM9000 Datasheet - Page 11

• Manufacturer Part Number: GSM9000
• Description: Tri-band Wireless Module Supporting Both GSM And GPRS
• Manufacturer: RF Solutions

Specifications of GSM9000

• No. Of Channels: 2
• Frequency Rf: 1.8GHz
• Module Interface: Serial, UART
• Kit Contents: Module Board Docs
• Tool / Board Applications: Wireless Connectivity-ZigBee, RF, Infrared, USB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Product Description
Huawei GTM900 GSM/GPRS Wireless Module
1.5 Functional Architecture of GTM900
Figure 1-2 Functional architecture of GTM900
1.6 Application of GTM900
1.6.1 Application to Terminal-Type Fixed Stations
Audio processing unit
management unit
processing unit
Serial interface
Power supply
Figure 1-2 illustrates the functional architecture of GTM900.
Through AT command sets, GTM900 communicates with the external CPU over the
URAT interface, performing such functions as radio transmit and receive, baseband
processing, and audio processing. The peripheral equipment like keyboard and LCD is
controlled by the external CPU.
The realization in the above way features:
When applying GTM900 to a terminal-type fixed station, you need an external CPU.
The CPU performs:
GTM900 performs the other functions.
See Figure 1-3 for the functional architecture of the terminal-type fixed station.
Trunking services, including voice group call, point-to-point communications, and
private call.
Simple interfaces
A variety of terminal products developed by the user with different types of
keyboards and LCDs
Configuration of the subscriber line interface circuit (SLIC) chip
Power supply management
Communications at the serial interfaces
CPU processing unit
Program and data
Digital baseband
processing unit
storage unit
Huawei Technologies Proprietary
1-3
AD/DA conversion unit
SIM processing unit
Analog baseband
processing unit
Chapter 1 Overview of GTM900
RF antenna switching
RF signal power
amplifying unit
RF Tx/Rx unit
unit