User's Manual

LGCell Main Hub
3-4 LGCell 4.0 Installation, Operation, and Reference Manual PN 8100-40
620004-0 Rev. B
3.1.2 Main Hub LED Indicators
The front panel of the Main Hub has LEDs that provide diagnostic information and
operational status of the unit.
Figure 3-4 Main Hub Front Panel LEDs
The Main Hub’s MMF port LEDs can be used to help troubleshoot downstream prob-
lems; however, the LEDs do not indicate which downstream component has the prob-
lem.
The Main Hub’s LED indicators are described in the following table.
Table 3-1 Main Hub LED Indicators
MMF Port
Indicators Color Indicates
LINK STATUS
Green
Red
Good connection to the Expansion Hub that is connected to the port.
Connection problem with the Expansion Hub that is connected to the port.
SYNC
Green
Red
Expansion Hub connected to the port is operating properly.
An alarm with the Expansion Hub that is connected to the port.
Unit
Functionality
Indicators Color Indicates
SYNC
Green
Off
Main Hub is correctly producing the synchronization signal.
Main Hub is not correctly producing the synchronization signal.
POWER
Green Main Hub has power.
MMF Port LED Indicators
Unit Functionality LED Indicators
(1 pair per hub)
(1 pair for each MMF port)
AC POWER
LGCell
TM
Main Hub
SYNC
POWER
LINK
SYNC
STATUS
DOWN
UP
1
LINK
SYNC
STATUS
DOWN
UP
2
LINK
SYNC
STATUS
DOWN
UP
3
LINK
SYNC
STATUS
DOWN
UP
4
TO EXPANSION HUB PORTS
LINK
STATUS
SYNC
SYNC
POWER