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Windows 9X Networking
Windows 98 dial-up networking now supports RFC 1717: The PPP Multilink Protocol (MP). Multilink combines multiple physical links into a logical bundle to increase bandwidth. For example, machines with two modems can combine them when dialing into a suitable server, thus doubling the data bandwidth.
Windows 98 dial-up networking uses Multilink over ISDN or analog modems. Because Multilink combines multiple physical links, it is available only on computers that have multiple modems, ISDN cards. In addition, both the dial-up client and dial-up server must have Multilink enabled for Multilink to be used.
Multilink with modems require that both modem are connected to separate telephone line. Communication will be at the highest common connect speed. That is to say if a customer has a 14.4 and a 28.8, the highest speed they can use with Multilink is 14.4
Configuring Dial-Up Networking to use Multilink
Configuring Dial-Up Networking to use Multilink requires the user to select the second device from the Multilink tab of a dial-up network connection
To configure Multilink
After configuring your additional devices, you are ready to dial your Multilink connection. When you dial the connection, Dial-Up Networking dials the primary number of the primary device specified for the connection. Once the first connection has been established, Dial-Up Networking dials the other devices specified in the Additional Devices list.
Once the connections are established, you can view status information about the link by double-clicking the communicating computers icon displayed in the taskbar, or you can disconnect.
Note: Using Multilink with two modems requires that both modems be connected to separate telephone lines. Communication will be at the highest common connect speed. For example, if you have modems with baud rates of 14.4 and 28.8, the highest speed you can use is 14.4.
The status information includes the number of bytes sent and received, the network protocols negotiated for use on the connection, and additional devices. When you select an additional device, a Suspend or Resume button is displayed. If a Suspend button is displayed, the device is in use and bundled into the multilink connection. Clicking Suspend disconnects that line and removes it from the bundled connections.
If the Resume button is displayed, click it to dial that connection and add that line to the bundle. You can suspend and resume individual links without dropping the connection.
To use Multilink
To view information about your link
Note: Currently, the Windows 98 Dial-up Server does not support Multilink. Users who want Multilink capabilities for their dial-up servers need to use Windows NT 4.0.
Multilink Support Issues
Multilink and Callback
If a client has a Multilink-enabled dial-up connection that they use to connect to a callback enabled RAS server, the callback can be made to only one of the Multilink devices. This is a result of the NT 4.0 RAS Admin utility allowing the administrator to store only one number for callback purposes, per user account. Therefore, the RAS Server calls only one of the devices and Multilink functionality is lost.
If the link between the client and RAS server is using ISDN with two channels that have the same phone number, then Multilink will work with callback.