User's Manual Part 2

6-4 Common Problems, Troubleshooting, and Frequently Asked Questions
LED Indicator Description
The LGC
ell
Main Hub, Expansion Hubs, and RAUs have front panel LEDs. The
LEDs provide diagnostic information and operational status of each unit. Together
they provide an efficient diagnostic display system, which help technicians find the
fault if there is a malfunction.
Main Hub LEDs
There are two sets of LEDs on the Main Hub
front panel:
•Main Hub MMF Ports
•Main Hub Functionality LEDs
•
Main Hub MMF Ports LEDs
Provides status on each of the Main Hub’s four MMF ports.
•
Main Hub Functionality LEDs
The LEDs provide diagnostic information on the Main Hub’s functionality.
LED Color Indication
LINK STATUS
Green
Red
Indicates a good connection to Expansion Hub for that port.
Connection problem to Expansion Hub.
SYNC
Green
Red
Indicates Expansion Hub and any RAUs connected to it are
operating properly.
Problem with Expansion Hub or one of the RAUs.
LED Color Indication
SYNC
Green Indicates Main Hub is correctly producing the
synchronization signal.
POWER
Green Turns green when Main Hub has power.