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2.4 LED Indicators
The diagnostic LEDs that provide 
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  | LED | Color | Status | Meaning | 
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  | PWR | Green  | On  | The switch unit is power on  | 
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  | Off  | No power  | 
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  | R.M.  | Green  | On  | The industrial switch is the master of   | 
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  | Off  | The industrial switch is not a ring master in   | 
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  | PWR1  | Green  | On  | Power 1 is active  | 
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  | Off  | Power 1 is inactive  | 
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  | PWR2  | Green  | On  | Power 2 is active  | 
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  | Off  | Power 2 is inactive  | 
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  | FAULT | Red  | On  | Power or port failure  | 
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  | Off  | No failure  | 
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  | Green  | On  | A network device is detected.  | 
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  | (Upper  | Blinking  | The port is transmitting or receiving packets from the TX device.  | 
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  | P9, P10 (RJ-  | LED) | 
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  | Off  | No device attached  | 
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  | Green  | On  | 1000M  | 
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  | Off  | 10/100M  | 
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  | Link/Active  | 
  | On  | The SFP port is linking  | 
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  | Green  | Blinks  | The port is transmitting or receiving packets from the TX device.  | 
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  | Off  | No device attached  | 
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  | On  | A network device is detected.  | 
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  | Green  | Blinking  | The port is transmitting or receiving packets from the TX device.  | 
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  | P1 ~ P8  | 
  | Off  | No device attached  | 
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  | On  | The port is operating in   | 
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  | Amber  | Blinking  | Collision of Packets occurs.  | 
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  | Off  | The port is in   | 
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