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NetComm NCT240 Management Guide
4. Troubleshooting
Troubleshooting guide
Trouble
PWR indicator
does not light up
after power on.
SYS indicator does
not light up after
startup.
ADSL2+ LINK
indicator does not
light up after
making a
connection.
UP LINK indicator
does not light up
after making a
connection.
Possible cause
Power outlet, power
cord, or internal power
supply may be defective.
Microprocessor,
SDRAM, Flash or
Software may be
defective.
NCT240 Switch, cabling,
ADSL Line, or ADSL
Switch Ports may be
defective.
Network cable or
Ethernet device attached
to this port may be
defective.
Solution
• Check the power outlet by plugging
in another device that is functioning
properly.
• Check the power cord with another
device.
• Verify that the switch is powered on.
• Check the boot-up statement from
console. The boot up procedure is
Boot -> kernel->application
•
• Verify that the Access Switch and
attached CPE are powered on.
• Be sure the RJ-21 cables are plugged
into the Access Switch from
ADSL2+ modem through the
Phone-line punch-down block.
• Verify that the cable length does not
exceed specified limits.
• Check the cable connections on the
access Switch, punch-down
block/patch panel, and the Extended
Ethernet CPE for possible defects.
Replace the defective cable if
necessary.
• Verify that the access 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.
Release 1.0
64
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