Configuring a link device

A link device is a physical device such as a modem, a synchronous or an asynchronous ISDN channel, or a directly-connected serial line. The link devices that are defined for a bundle control which devices it can use to establish an outgoing or incoming PPP link.

To modify the settings for a link device:

1. In the PPP Manager, select View Link devices to view the currently defined link devices.

2. To change an existing link device definition, select the link device from those listed, and then select Edit Modify.

3. You can change the following information about the link device:

   
   Enabled

   Whether the device can be used by bundles. Set to No to prevent PPP using the device.

   
   Flow control

   The type of flow control that will be used with a link device:

   
   None

   Do not use flow control.

   
   Hardware

   Use RTS and CTS handshake lines to perform flow control.

   
   Software

   Use XON and XOFF characters to perform flow control.

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   NOTE: Flow control settings are not shown for synchronous ISDN channels as they have no meaning for such devices.

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   Telephone number extension

   The digits of the telephone number that identify this device. These are appended to the common prefix that is defined in the global bundle.

4. Click on the button corresponding to the advanced options that you want to define or change for the link device:

   • Link Protocols

     Select the link protocols that the link device is to use from the list of those available and click on Add >> to move it to the selected list. At present, only the Link Control Protocol (LCP) is supported and should be selected.

     To edit the Link Control Protocol settings, select it and click on Edit. This will allow you to edit the following options:

     • LCP

     • Quality

     • Advanced (finite state machine options used by LCP)

   • Advanced (link device options)

5. Click on OK when you have finished configuring the link device.