General introduction: 
    GPRS is an English abbreviation of General Packet Radio Service which is a new carrier service based on present GSM system in order to offer GSM users packet data services. GPRS allows users to send and receive data under terminal to terminal packet transfer mode without using network resources under circuit exchange mode, which has generated a high efficiency, low cost wireless packet data services, not only applicable to discontinuous, paroxysmal and frequent data transmission of small quantity, but also to occasional large quantity data transmission.
    The GPRS theoretical bandwidth is up to 171.2Kbps and applicable bandwidth is about 40~100Kbps. TCP/IP protocol in this channel can be used for INTERNET connecting, data transmission etc. With data packet sending and receiving via GPRS technology, the users can remain on line since the service cost is rapidly reduced by charge according to flow.
    Basing on 2.5G communication network platform, W3100wireless data communication system can offer users virtual private data communication network for remaining on-line and transparent data transmission.

Product features:
• Support RS-232/485/TTL/10Base-T interface, offer A/D input/output interface, and provide users with transparent transmission channels.
• Built-in IP protocol suite, need no background computer support.
• Conform to ETSI GSM Phase 2+ standard
• Easy networking, support data transmission modes like point to point, point to multi-point and center to multi-point.
• Support virtual private network, users can form communication networks of ultra-far distance.
• Device always on line, charge according to data flow.
• System configuration and maintenance interface
• Support remote wake up
• Support dynamic domain name server
• Offer HMI central server TCP/IP forwarder, achieve instant networking without amending the original software.
•Anti-jamming design for bad electromagnetic environment

Application fields:
      Industrial telecommand, telemetering, telecontrol / electric power system automation/finance, retail industies /intelligent traffic/ water conservancy, weather, environmental protection

Networking method:
Realize central terminal with following two methods:
  Data center adopts INTERNET access, including static IP address and dynamic domain name.
  The stability and safety of the system performance will be greatly enhanced by adopting public fixed IP.   
  The dynamic domain name mode requires of applying a dynamic domain name for data center computer, which is easy to fulfill with low cost.
  A number of domestic companies offering the service can be applied for dynamic domain name. The public dynamic domain name is free of charge while the private ones will charge a small amount.
  Data center uses GPRS wireless network card for access to INTERNET, set fixed IP of mobile intranet in module. This kind of access method requires local GPRS network
supports APN function.
  APN function varies in different regions, free in some and requires fee in others. You can contact the data service department of local mobile companies for detailed information.

 Central GPRS data forward server program:

Solutions:
 Atmosphere environment monitoring data collection communication solutions
 Remote gate safety/check on work attendance/POS wireless networking solutions basing on GPRS  communication,
 Oil well/pipe net real time data collection and auto control system solutions
 Remote communication solutions of LED screen for intelligent traffic