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DIAGNOSTIC LED(S)
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LED
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Color
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Status
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Condition
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LED1
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Unidentified
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On
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LCF 1 status (see conditions in note below)
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LED2
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Unidentified
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Off
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LCF 2 status (see conditions in note below)
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LED3
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Green
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On
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Ring connection is good
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LED3
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Green
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Off
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Ring connection is broken
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LED4
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Yellow
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On
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Data is being transmitted/received
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LED4
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Yellow
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Off
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Data is not being transmitted/received
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Note: LED1 and LED2 vary depending on model. Red (On: Illegal connection, Off: Valid connection); or Orange (On: Line error alarm activated, Off: Line error alarm not activated).
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