Netcomm NCT240 Manuel D’Utilisation

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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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