Troubleshooting
No link (left LED is off).
•Remove the cable and plug it in again. Wait up to six seconds for a link.
•Make sure you’re using the right type of cable
•Make sure the device you’ve connected to a port is a
•Check the speed and duplex settings on the PC’s network adapter.
No link, yellow (right) LED above port is blinking slowly.
The hub’s speed setting doesn’t match the attached device’s speed setting. To correct the problem, change either the hub or device speed setting so they match.
Link, but yellow (right) LED above port is blinking erratically.
The port is partitioned
Intermittent loss of link.
•You may be using the wrong grade of cable. The wrong cable grade can cause erratic performance and you may eventually lose the connection between the port and the attached device. For more information, see page 12.
•If hubs are operating in a 100Mbps environment, make sure you use an Intel Cascade Cable, not UTP cable, to connect the hubs.
•Make sure the device connected to the hub port is configured for
•A cable segment somewhere in your collision domain is too long. Make sure none of your UTP cabling is longer than 100 meters.
•Make sure your stack contains no more than eight hubs.
10Mbps or 100Mbps devices can’t communicate with each other.
Internal bridging might be disabled. Check to see if the Bridged LED on the 220T hub is on. If it is not, press the Enable/Disable Bridging button.
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