3Com 3C780 User Guide - Page 114

Port 1= B, port 2 = A, other ports = M

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5-12 Using the Hub Table 5-8. Interpreting Management Module LEDs LED PWR ATTACH B/A S/M M/M STATUS Color Indicators Green Green Green Green Amber Flashing amber/green Flashing amber/off TOKEN Flashing green/off Green Green WRAP FAN FAIL HI TEMP Off Amber Amber Amber LOW BATT Amber Meaning Hub is on. Only one attachment exists at any one time. Configuration refers only to module in slot 1: Port 1= B, port 2 = A, other ports = M Port 1= S, other ports = M All ports = M From 0 to 20 seconds after reset: power-on self-test (POST) is in progress. 20+ seconds after reset: hardware failure has occurred in management module, backplane, or critical parts of port modules. Access to the primitive command mode is available now. If a reset occurs during this limited period, you are instructed to press [Ctrl]+P to enter primitive console mode Failure has occurred during download operation. TFTP download is in progress. Normal operation. The token is circulating and the ring is operational. A ring operation is occurring. The ring is wrapped. A fan failure has occurred. A high-temperature condition exists (above 50˚ C inside the chassis). A low battery voltage condition exists.

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5-12
Using the Hub
Table 5-8.
Interpreting Management Module LEDs
LED
Color Indicators
Meaning
PWR
Green
Hub is on.
ATTACH
Only one attachment exists at any one time.
Configuration refers only to module in slot 1:
B/A
Green
Port 1= B, port 2 = A, other ports = M
S/M
Green
Port 1= S, other ports = M
M/M
Green
All ports = M
STATUS
Amber
From 0 to 20 seconds after reset: power-on
self-test (POST) is in progress.
20+ seconds after reset: hardware failure has
occurred in management module, backplane,
or critical parts of port modules.
Flashing amber/green
Access to the primitive command mode is
available now.
If a reset occurs during this
limited period, you are instructed to press
[Ctrl]+P to enter primitive console mode
Flashing amber/off
Failure has occurred during download
operation.
Flashing green/off
TFTP download is in progress.
Green
Normal operation.
TOKEN
Green
The token is circulating and the ring is
operational.
Off
A ring operation is occurring.
WRAP
Amber
The ring is wrapped.
FAN FAIL
Amber
A fan failure has occurred.
HI TEMP
Amber
A high-temperature condition exists (above
50˚ C inside the chassis).
LOW BATT
Amber
A low battery voltage condition exists.