Displays the name of your ISDN hardware.


Enables you to set the number of channels your ISDN line uses, according to what your telephone company has provided.


Move the slider to indicate how many channels your ISDN line uses.

If only one channel is active, the line is automatically set to use one channel.


If checked, indicates that you can only connect if the number of channels that you specified above are all available.

This means that if there are fewer available, the connection will fail, or if you are connected and one channels disconnects, the connection will hang up.

This checkbox is useful if you need a certain number of channels to transfer specific information.


Click the arrow to see a list of speed preferences for your ISDN service.

The different speeds reflect those supported by your ISDN adapter.

The default setting is the highest speed.


If checked, specifies that the specified speed must be established to connect successfully.


If checked, an ISDN icon will appear on your taskbar when you attempt to dial out using your ISDN line. You can double-click this icon to see information about connection status.

(Not yet implemented)


If checked, Windows will record the most recent connection progression to a log file, called ISDNLOG.TXT. This file is located in your Windows folder.

(Not yet implemented)


If checked, Windows will hang up if there has been no activity on the line for more than a certain number of minutes, which you specify in the corresponding box.

(Not yet implemented)


Click this to view or modify properties for the ISDN line itself.


Displays the switch type that you selected in the previous dialog box.

To change this setting, click cancel, and then select a new switch type from the list.


Click this to change the phone number or SPID for a particular channel.  If no channel is selected in the above list, this button is grayed out.


Enables you to set or modify the phone number and SPID for a particular channel.

The switch type is determined by the setting from the previous dialog box.


If checked, the SPID will be determined automatically, according to derivation rules of the switch provider.

If unchecked, you can type the SPID in manually in the box provided.


Enables you to set some optional preferences, such as displaying and logging connection status.


Lists the different switch types that are supported by your ISDN adapter.


Lists the B-channels for the physical ISDN line and their corresponding phone numbers and SPIDs.

To change the phone number or SPID for a particular channel, click the channel in the list, and then click Modify.