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5
Overview
CHAPTER 1
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.
Off Hub is not receiving power.
Stat Hub status Green Hub has power, has passed the
confidence test, and is operating
normally.
Amber At initial power up, indicates the hub is
running its confidence test. If this LED
lights after the confidence test is
performed, the hub is not operating
normally due to a fan failure, a power
supply failure, or a confidence test
failure.
Off Hub is not receiving power.
RPS Not supported N/A N/A
Col Collision status Amber A collision was detected on the
segment.
Off Collisions are not detected on the
segment.