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NetComm NCT240 Installation Guide Release 1.0
5. Troubleshooting
Troubleshooting guide
Trouble Possible cause Solution
PWR indicator does
not light up after
Turning on the
power.
Power outlet, power cord,
or internal power supply
may be defective.
• Check the power outlet by plugging in
another device that is functioning
properly.
• Check the power cord with another
device.
SYS indicator does
not light up after
startup.
Microprocessor, SDRAM,
Flash or Software may be
defective.
• Verify that the switch are powered on.
• Check the boot-up statement from
console. The boot up procedure is Boot
-> kernel->application
•
ADSL2+ LINK
indicator does not
light up after making
a connection.
NCT240 Switch, cabling,
ADSL Line, or ADSL Switch
Ports may be defective.
• 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.
UP LINK indicator
does not light up
after making a
connection.
Network cable or Ethernet
device attached to this
port may be defective.
• 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.
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