A-1
Issue 1 February 2011
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A Troubleshooting
Overview
Purpose
This Appendix provides guidance for troubleshooting. The CPE operation can easily be
monitored via the LED indicators to identify problems. The table below describes
common problems you may encounter and possible solutions.
Diagnosing
Symptom Possible cause Solution
POWER LED
does not light
up after power
on.
Power outlet, power
cord, or power adapter
may be defective.
• Check the power outlet by plugging in another
device that is functioning properly.
• Call the Customer Support Hotline or return
the device to the vendor.
VDSL is
flashing slowly
after making a
connection.
The cabling, or the
VDSL port on the CPE
may be defect.
• Verify that the CPE is powered on.
• Make sure the cable is correctly plugged into
the VDSL line wall outlet and the CPE
connector labeled "VDSL".
LAN LED does
not light up
after making a
connection.
Network interface
(e.g., a network
adapter card in the
attached computer),
network cable, or the
LAN port on the CPE
may be defect or not
connected.
• Verify that the CPE and the computer device
are powered on.
• Make sure that the cable is plugged into both,
the CPE and the device.
• Verify that the proper cable type is used and its
length does not exceed specified limits.
• Check the network adapter in the device and
the cable connections for possible defects.
Replace the defective adapter or cable if
necessary.
MESSAGE is
flashing
At the moment a CPE
firmware upgrade is
executed.
• Wait until the firmware upgrade is passed and
the DIAG LED is “On”.
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