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17
Connecting the Devices
CHAPTER 3
• The Data % LEDs light green on each hub, indicating the overall
network utilization percentage of the Ethernet segment. Because a
stack of hubs is a single segment, utilization is the same for each
hub in the stack.
• If an optional uplink module is installed in the media adapter slot,
the appropriate cable is connected to the media adapter port, and
the link status is good, the Media Adapter LED lights green. When
this LED is on, port 1 on the hub is disabled.
• If an NMM is installed in the expansion slot, the Enbl LEDs on
each hub in the stack light green, indicating the hub is properly
connected to the other hubs in the stack and is actively managed by
an NMM.
• If an NMM is installed in the expansion slot, the Management
LEDs light as follows:
– The Stat LED lights green, indicating the NMM passed the
confidence test and is operating normally.
– The Mstr LED lights green, indicating the NMM is the master
NMM in the stack.
• A Port Status LED for each port on the hub provides port status.
LED Color Status indications
Hub ports 1–12 Green Link is good, port is not
partitioned (disabled).
Amber Link is good, port is
partitioned.
Off Link is not detected.