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Troubleshooting
USB signals are generally reliable but are susceptible to bad connections or cables that
are too long. The TP cable can have the same issues. To avoid the loss of data and
communications, follow these guidelines:
• The USB cables that connect the transmitter to the host or the receiver hub ports to
peripheral devices should not exceed 6feet (1.8meters).
• When connecting the host or peripherals, use only cable designed for USB signals.
• Avoid or limit the use of adapters.
• The USBExtender Plus works as described in point-to-point applications. Do not use
additional adapters, patch panels, or couplers with the host USB cables, hub USB
cables, or twisted pair cables. Additional links in the signal chain can result in the
reduction of signal integrity and overall system performance.
When properly connected and operating, the transmitter and receiver Power LEDs, Link
LEDs and Host LEDs are lit. The Hub LED for each connected peripheral recognized by the
host PC is also lit.
Front panel LEDs are also useful for troubleshooting. The following table outlines operating
details indicated by the LEDs.
Transmitter Receiver)
LED
Indicator
On Off On Off
Power
12 VDC power supply is
connected and operating
properly.
12 VDC power supply is not
connected or is defective.
12 VDC power supply is
connected and operating
properly.
12 VDC power supply is not
connected or defective.
Link
Both transmitter and receiver
are paired, have power, and
are connected properly by
the TP cable.
If both Power LEDs are on, the
TP cable is not connected or is
improperly wired, or the units are
not paired.
If either Power LED is off, see
the Power LED troubleshooting
instructions, above.
Both transmitter and receiver
are paired, have power, and
are connected properly by
the TP cable.
If both Power LEDs are on, the
TP cable is not connected or is
improperly wired, or the units
are not paired.
If either Power LED is off, see
the Power LED troubleshooting
instructions, above.
Host
When transmitter power
LED is on, lights when
communication with host PC
is established.
If transmitter power LED is on,
USB cable is not connected.
Lights when communication
with host PC is established.
Blinks if power and Link
LEDs are on, but no USB
devices are connected.
Host USB port is not
connected or host is not
communicating.
Hub
N/A N/A Lights when a connected
peripheral is recognized by
the host PC.
A peripheral device connected
to the USB port has not been
recognized or is improperly
connected.
Table 1: System Troubleshooting
USB Extender Plus T/R • Installation and Operation 11