3Com IntelliJack NJ200, User Manual, Page: 49 / 58

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Troubleshooting the NJ200
If you encounter problems with the Network Jack:
■
Verify the Network Jack is receiving power by viewing the Power LED (it should be
on). If the Power LED is not on, make sure the:
■
Power Over Ethernet dip switches are set correctly (for either Capacitive Power
Discovery Process 24V or 48V or IEEE 802.3af), if your network supports Power
Over Ethernet. See “Setting the Power Over Ethernet Dip Switches” on page 7
for instructions.
If using Power Over Ethernet, make sure the other end of the network cable is
plugged into a switch on the network that has Power Over Ethernet integrated
into it, or one that feeds into an external midspan power supply that supports
Power Over Ethernet.
■
Local power supply is plugged into the Network Jack and into a working
electrical outlet, if your network does not support Power Over Ethernet.
■
Verify the Network Jack is connected to the network properly by viewing the Link LED
(it should be on). If the Link LED is not on, make sure the network cable:
■
Is terminated properly. Refer to the connector manufacturer’s instructions for
terminating the cable. Be sure to test the connector and verify it is working.
■
Has a valid connection to the network.
■
Adheres to proper length and cabling specifications for your network.
■
The Network Jack is configured for manual MDI. Be sure to use a straight-through
cable. If you want to use a cross-connect cable, you must change settings in the
Configuration Manager software.
Troubleshooting Matrix
Event/Message Description Solution
Power LED is not on Network Jack is not receiving
power Ensure power supply is properly
connected.
For power over Ethernet, make sure dip
switch settings are correctly set and that
cable is connected to both the LAN port
on the back of the Network Jack and to
the workgroup switch.
Link LED is not on Network Jack has no
connection to the network Make sure network cable is properly
terminated. Make sure the Network Jack
is connected to the network. Make sure
the cable is plugged into the workgroup
switch.