The product great majority that is based on Windows CE at present has online function, can receive Internet to realize the webpage that browse repeatedly, send and receive the basic function such as mail. Should realize more functions to depend on the speed of join Internet, and speed depends on the means of join Internet. The means cent of join Internet is two kinds: Wired and wireless. In fact most product still uses wireless online means.

The Pocket PC that is based on Windows Mobile and Smart Phone can realize online function easily. The software development staff of these two kinds of products need not need how overmuch consideration comes true dial get online. And the product of kernel of custom-built to using Windows CE, relevant software develops personnel must oneself realize date to get online. Included in the SDK of Windows CE fortunately dial online support, make the job of software development staff is reduced greatly.

Dial online hardware equipment can be modem of the buy inside independent belt and the mobile phone that have GPRS function, also can be to embed advocate board in the mobile phone chip that contains same function. Specific what be not important, the dials online module uses a level AT that includes because of Windows CE commands collect and hardware equipment correspond. The interface function that software develops personnel to be able to use CE to offer directly will control whole dial process, until disconnect join.

Windows CE.net offerred a RAS that be called (Remote Access Service) service, the product that is based on Windows CE through RAS can pass WAN (wide area newwork) or VPN (fictitious individual network) join arrives on long-range server. The applied program that calls RAS is carried out on client computer normally, receive long-range server repeatedly through telephone network, this kind of join uses the long-range visit agreement of two kinds of standards: PPP nods agreement of Internet of serial to nodding agreement and SLIP circuitry. RAS structure is shown 1 times like the graph. Can see from inside the graph RAS is in the superstratum of ISO/OSI model, lower TAPI (phone API) call Unimodem, unimodem is general modem driver, it calls the communication of implementation of the API that string together a mouth and modulation demodulation equipment.


All functions that place of the RAS below Windows CE.NET has are the same as the likeness below PC, script for story telling of same support report, dial control script. The electric script for story telling that different is the RAS below CE is to deposit in registering a watch. These are less important functions, do not give here tell about. Implementation dials the function that must transfer is as follows:
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