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DIAGNOSTIC LED(S)
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PWR
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COL
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RX
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TX
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Condition
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Off
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Off
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Off
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Off
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Power is off or the DTE or the DTE card is bad
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On
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Off
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Blinking
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Off
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Data is being received
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On
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On
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Off
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Off
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Collision detected
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On
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Off
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Off
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Blinking
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Data is being transmitted
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On
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Off
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Off
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Off
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Data is not being transmitted/received or there is an error with the transmit side of the DTE
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On
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On
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On
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On
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Signal Quality Error signal is on
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On
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Off
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On
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On
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Signal Quality Error signal is off
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On
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Off
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Off
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On
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The transceiver or the AUI cable is bad or there is an error with the transmit side of the DTE
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On
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Off/On
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Off
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Off
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The tap is not terminated correctly or the backbone is not functioning
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