System Status LEDs, Continued
Ethernet Port LEDs
Cross Link Status
LED
There are four Ethernet Link Status LEDs.
| Link Active | LED is Green (on) when a link is established success- | |
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| fully between the Ethernet port and associated Ethernet | |
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| Hub or repeater. | |
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| If LED is OFF check for a bad cable, faulty wiring, or | |
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| loose connections. | |
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| Rx | Rx LED blinks when there is data reception on the | |
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| Ethernet port. | |
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| Tx | Tx LED blinks when the Ethernet port transmits a mes- | |
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| sage. | |
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| Collision | Collision LED blinks when there is a collision on the | |
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| Ethernet link. A collision is a normal event on an | |
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| Ethernet link and occurs when both sides of the link | |
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| attempt to transmit at the same time. Excessive colli- | |
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| sions indicate a problem with the network. | |
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| Could be a cabling problem or bad network interface | |
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| board. | |
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The cross link status LED is red when no link is established between the two DataNET Hub halves, and is green when a connection is detected. Usually a red indication is caused by the absence of the cross link cable or a faulty connection.
64 • Data Communications Setup |