C H A P T E R 1 Overview
LED matrix
The LED matrix on the Express Stackable Hub’s front panel allows you to view the hub’s operational status, collisions, network utilization, NMM status, and port status.
The following table describes the LEDs on the matrix.
Label | Type | Color | Meaning |
Pwr | Hub power supply status | Green | Hub is receiving power. |
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| Off | Hub is not receiving power. |
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Stat | Hub status | Green | Hub has power, has passed the |
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| confidence test, and is operating |
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| normally. |
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| Amber | At initial power up, indicates the hub is |
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| running its confidence test. If this LED |
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| lights after the confidence test is |
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| performed, the hub is not operating |
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| normally due to a fan failure, a power |
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| supply failure, or a confidence test |
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| failure. |
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| Off | Hub is not receiving power. |
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RPS | Not supported | N/A | N/A |
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Col | Collision status | Amber | A collision was detected on the |
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| segment. |
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| Off | Collisions are not detected on the |
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| segment. |
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