Slower Modem Speed Reported After Upgrading Windows

• Microsoft Windows 95
• Microsoft Windows 98
• Microsoft Windows NT Server version 4.0
• Microsoft Windows NT Workstation version 4.0

SYMPTOMS

Your 32-bit communications programs may report that they are communicating at a slower speed than your 16-bit communications programs. For example, if your 16-bit programs report that they are communicating at 38,400 bits per second (bps), your 32-bit programs may report that they are communicating at 14,400 bps.

CAUSE

32-bit communications programs that are designed for Windows 95, Windows 98, or Windows NT 4.0 report the modem line speed when reporting the speed at which the program is communicating. The modem line speed is the speed between your modem and the modem you are connected to, or the speed at which data is transmitted over the telephone line.

Most 16-bit communications programs that are designed for Windows 3.x report the port speed when reporting the speed at which the program is communicating. The port speed is the speed between your modem and your computer, or the speed between the serial port that your modem is connected to and your computer. The port speed is typically faster than the modem line speed, causing 16-bit programs to report a faster speed than 32-bit programs.

RESOLUTION

The following workaround affects the speed that your communications program reports. It does not affect the speed at which your modem is connected:

1. Click Start, point to Settings, and then click Control Panel.



2. Double-click Modems.



3. Click your modem, and then click Properties.



4. On the Connection tab, click Advanced.



5. In the Extra Settings box, type S95=0, and then click OK.



6. Click OK, and then click Close.

MORE INFORMATION

When identifying the modem speed, the modem line speed is typically used. The modem line speed is also known as the data link speed or data circuit- terminating equipment (DCE) speed. This speed is typically 2400 bps, 9600 bps, 14,400 bps, or 28,800 bps.

The port speed is used instead of the modem line speed to identify the modem speed in some cases. The port speed is also known as the serial port connection speed or data terminal equipment (DTE) speed. This speed is typically 19,200 bps, 38,400 bps, 57,600 bps, 115,200 bps.

Additional query words:

Keywords          : kbenv win95 wincomm win98 NTSrvWkst 
Version           : 4.0 95 98
Platform          : WINDOWS 
Issue type        : kbprb 

Last Reviewed: January 23, 1999