US Robotics 56K USB Modem User Manual page 135

Solution 2:
When you insert or remove a USB cable from your computer, the computer should indicate activity such as
hard disk activity or an hourglass cursor. If the computer does not show any sign of activity, your system
may not be properly communicating with the USB ports. Try these techniques to determine whether the
ports are communicating properly:
1. Try using a different USB port on the computer. If you are using a USB hub, try using a USB port on the
computer instead.
2. If the modem has worked previously and you removed the USB cable from the computer and then
reconnected it, try another USB port. The modem may have been installed originally on the other USB
port.
3. Windows Users: Your USB port may not be enabled. To ensure that USB is enabled on your system:
A. Go to the device manager:
Windows Vista:
1.Click Windows Start > Control Panel > System and Maintenance > System.
2.Under Tasks, click Device Manager.
Windows XP:
1.Click Windows Start > Control Panel.
2.Double-click System.
3.On the Hardware tab, select Device Manager.
Windows 2000:
1.On the desktop, right-click My Computer and select Properties.
2.On the Hardware tab, click Device Manager.
3.Look for an entry for USB controllers:
B. If the device manager does not have an entry for USB controllers, you must enable USB in the com-
puter's BIOS. For instructions, check with your computer manufacturer's technical support. Once
your USB port has been enabled in your system's BIOS, Windows will automatically detect and
install USB support when you restart your computer.
56K USB Modem
User Guide
Troubleshooting - 129