1. General

GPRS is General Packet Radio Service built on the basis of GSM network to provide packet data service. It works at the same frequency band, the same modulation and the same TDMA frame structure with GSM. GPRS can be implemented at existing GSM BSS by plug-in packet data card and associated updated software. Therefore, the system coverage is as same as GSM network. GPRS users can transmit and receive data from end to end by packet model. Packet data service is highly efficient and low cost for customers, for it does not occupy the circuit switched network resources. In this way, GPRS is a great communication channel for interrupting and bursting data transmission.

Maximum GPRS bandwidth can reach 171.2Kb/s and the actual application is 40~100Kb/s. Provided TCP/IP protocol connections on this channel, GPRS network can be applied on Internet connection and data transmission, etc..

GPRS is a kind of mobile packet data service that provides high speed wireless IP connection between mobile users and data network. It is developed with packet switch technology; each user can occupy multiple radio channels, at the same time, one single radio channel can be shared by multiple users. Thus, radio resources are effectively utilized and the maximum GPRS bandwidth can reach 171.2Kb/s. Remaining online all the time, users pay merely for the data transmitted and received because of this technology.
　

• H7118 GPRS DTU: RS-232/422/485 interface, high performance
• H7161 GPRS DTU: Ethernet interface
• H7710 GPRS/CDMA DTU: RS232/422/485 interface, common platform, supports GPRS or CDMA 1X network
• H7031 Data Server Kits: User data center server, provides the GPRS packed data protocol conversion. It is a set of develop kits for users to integrated with their applications.

* DTU = Data Termination Unit

The system network diagram

The system application FAQ refers to “Frequent Asked Questions".

2. H7100 GPRS DTU Features
　

3. H7100 GPRS DTU Functions
　

• Ease to use, reliable and flexible
• Support dual band GSM/GPRS
• Complied with ETSI GSM Phase 2+ standard
• Always online
• Support A5/1&A5/5 encrypted arithmetic

Enhanced Functions

• Transparent data transmission
• Support virtual private data network

• Point to point, point to multipoint, center to multipoint data transmission
• SMS backup channel (option)
• STK card configuration
• RS-232/422/485 or Ethernet interface
• Voice interface
• System configuration and maintenance interface
• System upgrade by Xmodem protocol
• Support web-based configuration
• Self-diagnostic and alarm output
• EMC/EMI design
• Reserved resources for developer

4. H7100 GPRS DTU Specifications
　

• Voice and Emergence Call
• Full rate, Enhanced full rate and half rate
• Echo canceller and noise suppression (option)
• Support DTMF signaling

GPRS data

• GPRS Class 2~10
• Code plan: CS1~CS4
• Complied with SMG31bis specifications

Interface

• Antenna: 50ohm/SMA/Female
• SIM card: 3V
• Serial data interface
   TTL
      RS-232 (DCE or DTE)
      RS-422
      RS-485

• Serial data rate: 300 to 115,200 bits/s
• Ethernet: 10BaseT
• Configuration interface: RS-232
• Voice interface: Ear/Microphone
• Alarm output interface: TTL

Power Supply

• Voltage: +7.5~+26VDC
• Power consumption
      Max. current: 230mA@+12VDC
      Idle: 12mA@+12VDC

Others

• Mechanical: 83.5x47x17.5
  (not include antenna)
• Weight: 100g
• Operation temperature: -30~+70ºC
• Related humidity: 95%(non-condensing)

5. GPRS Mobile Data Communication System Applications

Hongdian H7000 GPRS mobile data system is a universal communication system for industries and utilities. It adapts to all applications that require medium and low rate data communication, such as power distribution network, running water, gas pipe, weather station, traffic control, POS and so on. It can also be used for corporate Internet access to extend LAN at remote site. H7000 system may be utilized at following applications.

• Utilities
      Power distribution network supervision
      Running water and gas pipe line supervision
      Central heating system supervision
      Weather station data transmission
      Hydrologic data acquisition
• Finance
      POS data transmission
      Vending machine
      ATM
• Security and traffic control
      Policy
      Traffic info guidance
      Parking meter
• Industry
      Telecom equipment supervision (Mobile base station, microwave or optical relay station)
      Oil field data acquisition
      Warehouse supervision
      Taxi

6. What is the difference?
　

Ordering Information

H7100 GPRS data communication system has been used at many circumstances. Considering the application environment, customers can order different boards, modules and accessories in accordance with their requirements. There are following modules and accessories can be selected; the data center should be developed and integrated with customers applications.

Related Information

• Mobile Data System Introduction
• GPRS Mobile Data System Specifications
• IP address NAT configuration description (Chinese Version)

Software Download

• Hongdian Download Center
• Data Center Demo(GPRS_Demo)
• Data Center Demo (VB Version)
• Data Center Demo (VC Version)