Microsoft KB Archive/139140

= Microsoft Knowledge Base =

Older Supra Modems May Not Work on Unitel Phone Lines
Last reviewed: October 7, 1997

Article ID: Q139140

The information in this article applies to:


 * The Microsoft Network versions 1.0, 1.05, 1.2, 1.3, 2.0, 2.5

SUMMARY
Unitel (Canada) uses v.34 modems on its network. As a result, older models of the Supra FAX 144i fax/modem that use the Rockwell chip set may not work correctly.

MORE INFORMATION
To identify models with the older chip set, use the ATI3 command. If the result is version 1.4 or 1.5, the chip set is new and will probably work correctly. If the result is any other number (such as 1.2, 1.3, or 1.8) the chip set is older and may not work correctly.

To use the ATI3 command, follow these steps:


 * 1) Start HyperTerminal.
 * 2) Type a name for the new connection (for example, Test) in the Name box.
 * 3) Click an icon for the connection, and then click OK.
 * 4) In the Connect Using box, click Direct To COM , where  is the COM port the modem uses, and then click OK.
 * 5) Verify the settings on the Port Settings tab, and then click OK.
 * 6) Type "ATI3" (without quotation marks) and then press ENTER. The modem and version number should be returned.
 * 7) Quit HyperTerminal. When you are prompted to save the session, click No.

If you have a modem with the older chip set, you may be able to work around the problem by adding the following extra setting to turn off modem link negotiation and lock the modem at 14,400 bps:

&F@NS37=11 To add this setting, follow these steps:

 Click Start, point to Settings, and then click Control Panel. Double-click Modems. Click your modem, and then click Properties. On the Connection tab, click Advanced.  In the Extra Settings box, type the following line: &F@NS37=11  Click OK or Close until you return to Windows.