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T
ROUBLESHOOTING
Symptom
Ethernet port
Link indicator
does not light up
after making a
connection.
VDSL port
LINK indicator
does not light up
after making a
connection.
Fault is on
amber.
A-2
Table A-1 Diagnosing Switch Indicators
Possible Cause
Network cable or
Ethernet device
attached to this port
may be defective.
VDSL switch,
cabling, or VDSL
switch ports may be
defective.
Fan failure,
temperature
threshold exceeded,
or other hardware
malfunction
Action
• Verify that the switch and
attached device are powered on.
• Be sure an Ethernet cable is
plugged into both the switch and
attached device.
• Verify that the proper cable type
is used and its length does not
exceed specified limits.
• Check the network cable
connections for possible defects.
Replace the defective cable if
necessary.
• Verify that the VDSL switch and
attached CPE are powered on.
• Be sure the RJ-21 cables are
plugged into the VDSL switch
and the VDSL punch-down
block/patch panel.
• Verify that the cable length does
not exceed specified limits.
• Check the cable connections on
the VDSL switch, punch-down
block/patch panel, and the VDSL
CPE for possible defects. Replace
the defective cable if necessary.
• Have the switch replaced.
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