Dial-up OS Design Development (Windows Embedded CE 6.0)
1/6/2010
The Dial-up Networking functionality is implemented using Remote Access Service (RAS) and the Point-to-Point Protocol (PPP). Dial-up Networking allows a device to access network resources from a remote location. First, a connection is established with the remote computer, and then the device, or client, can upload and download files.
RAS connects a client to a host computer, known as a remote access server. A device running RAS connects to a remote access server using PPP. PPP is a set of industry standard framing and authentication protocols that enable remote access. A device can connect to a remote access server using a direct serial, infrared, or a dial-up connection.
Applications using RAS can link to Coredll.lib to resolve RAS application programming interface (API) entry points, to determine the proper method for a device build, or to link to the Windows XP RAS API set (Rasapi32.lib).
RAS custom scripting allows you to customize the process of establishing a connection. AutoDial enables a device to automatically attempt a new dial-up connection when the current connection fails.
OS Design Information
The following table shows operating system design information for Dial-up Networking.
| Concept | Description |
|---|---|
Dependencies |
TCP/IP Message Queue |
Hardware considerations |
Modem |
Modules and Components
The following table shows the components and modules that implement Dial-up Networking.
| Item | Module | Component |
|---|---|---|
Dial-up Networking |
Ppp |
None |
AutoDial |
Autoras |
None |
Standard Modem for Dial-up Networking |
asyncmac, unimodem |
None |
Dial-up Networking Implementation Considerations
The following table shows the Sysgen variables for Dial-up Networking.
| Sysgen variable | Description |
|---|---|
SYSGEN_PPP |
When this variable is set, the Dial-up Networking (RAS/PPP) Catalog item is included in the OS design. |
SYSGEN_AUTORAS |
When this variable is set, the AutoDial Catalog item is included in the OS design. |
SYSGEN_MODEM |
When this variable is set, the Standard Modem Support for Dial-up Networking Catalog item is included in the OS design. |
Operating System Development Topics
Unimodem OS Design Development