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The following table provides troubleshooting tips. The topics are arranged in the order in which they
should be executed in most situations. If you are unable to resolve the problem after following these
instructions, please contact Technical Support for further assistance.
PROBLEM
USB device is attached
but not functioning.
USB device is attached
but not functioning.
Link LED
on the LEX and REX
blink intermittently.
Link LED on the LEX and
REX is off.
Contacting Technical Support
CAUSE
• The USB device requires drivers
that were not installed.
• The USB device does not support
USB hubs.
• The USB device has malfunctioned.
Overcurrent condition has occurred
because the USB device has drawn
more current than can be supplied
per USB specification (1A). Operating
system may generate a status bubble
indicating an issue.
The CAT 5e/6/7 cable connecting the
LEX and REX is faulty.
• The REX is not receiving power.
• The LEX is not receiving power.
• The link cable is malfunctioning.
• The extender system is
malfunctioning.
SOLUTION
1. Install the required USB device driver on
the computer operating system prior to
attaching the USB device into the REX.
Please see your USB device manufacturer's
website for details.
2. In the Universal Serial Bus controllers
section of Device Manager, check that the
USB device has enumerated.
3. Contact Technical Support for assistance.
1. Power cycle REX by unplugging the power
adapter from the extender. Wait
approximately 30 seconds and then plug the
power adapter back into the REX.
2. If overcurrent continues to occur, either:
(a) the USB device may use more power
than the USB specification, or (b) the USB
device may be damaged.
3. Consult your USB device documentation
and power your USB device with the
required power supply.
1. Ensure the CAT 5e/6/7 cable is of decent
quality.
2. Test the Link with a Gigabit Ethernet
tester
2. Contact Technical Support for assistance.
1. Confirm the host computer is on and
providing power to LEX.
2. Ensure the supplied AC power adapter is
properly connected to either the LEX or the
REX.
3. Ensure the CAT 5e/6/7 cabling between
the LEX and REX is properly installed or
replace the link cable.
4. Check that the AC adapter is connected
to a live source of electrical power.
5. Contact Technical Support for assistance.
Page 10 of 13
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