US Robotics 56K External Modem

Troubleshooting

1. Click Windows Start, point to Settings, and click Control Panel.
2. Double-click the Modems icon.
3. Click the Diagnostics tab.
4. Click on the COM port that your modem is assigned to, so that it is highlighted. If you do not see your modem on this screen, you will need to shut down your computer and uninstall the modem. Reinstall the modem following the instructions in the “Installation Guide”.
5. Click More Info. You should see a list of the modem’s ATI commands. Click OK. If you do not, your modem is not properly installed. Shut down your computer and uninstall the modem. Reinstall the modem following the instructions in the “Installation Guide”.

Computer Won't Recognize Modem

If you are using an external modem, make sure the modem is plugged in and turned on. Use only the power adapter included with the modem. The power switch is located on top of the external case. The CS light on the front panel should be lit.

You may have a COM port/IRQ conflict. If you have an internal modem and a Windows 95 system,

1. Right-click the My Computer icon on your desktop.
2. Click Properties.
3. Click the Device Manager tab. If you see a yellow exclamation point over your modem, you have a resource conflict, and it is probably an IRQ conflict.
4. Click the modem’s name to select it.
5. Click Remove.
6. You will be asked if you are sure you wish to remove the device. Click OK.
7. When the system has removed the modem software and information, shut down and turn off your computer.
8. Unplug the computer from its electrical outlet.
9. Remove the cover of the computer, physically remove the modem from its ISA slot, and replace the cover.
10. Plug the computer back into the electrical outlet, and turn it on.
11. When Windows restarts, right-click the My Computer icon on your desktop.
12. Click Properties.
13. Click the Device Manager tab.
14. Double-click Computer.
15. Make sure the "Interrupt request (IRQ)" radio button at the top of the screen is checked. You can determine which IRQ settings are free on your system by looking for numbers that are not listed in the Setting column.

One of the following IRQs needs to be free: 3, 4, 5, or 7 (or 9 if you have a Winmodem). If there are no IRQ settings free in this range, you need to move a device off of one of these IRQs, in order to free it for use by your modem. We recommend removing other modems or disabling COM ports that may be using one of these IRQs.

1. After you have made these changes, reinstall the modem using the instructions in the "Installation Guide". Once your modem is properly installed, make sure you have the correct COM port and IRQ settings in your

software and/or in the Windows Device Manager.