Nortel Networks 60-12T - Manual (Page 33)

206378-A 4-1
Chapter 4
Troubleshooting
This chapter provides common testing methods, possible reasons for problems,
and possible steps to take to solve the problems.
Verifying System Operations
You can verify that all attached devices have valid connections. The hub monitors
the link status for each port. If a device is properly connected to the hub and if the
device is transmitting a link signal, the Link indicator will light up for the
corresponding port.
Follow these steps if the Link indicator fails to light when you connect a device to
the hub:
1. Verify that the twisted-pair cable is properly attached to the connected
device and the hub.
2. Verify that the media connector, or RJ-45 connector, snaps securely into
place when attached.
3. Verify that your cable is functioning properly. Try attaching the cable to
another port on another attached device that appears to be functioning
properly.
4. Check the length of each twisted-pair cable.
• Each cable should be no longer than 100 meters, or 328 feet, long.
• If you are using two cascaded Fast Ethernet hubs be sure the cable
between the two hubs is no longer than 5 meters, or 16 feet, long.
5. Verify that the attached workstation has a functioning adapter card.
Try the card in another workstation that is successfully connecting to the
network.