ADC Telecommunications Inc. F0684-112 Manual Do Utilizador

4-5

CONFIDENTIAL

SC/APC fiber connectors throughout the fiber network, including fiber distribu-
tion panels. This is critical for ensuring system performance.

The unit’s front panel LEDs indicate fault conditions and commanded or fault lockouts. 
The LEDs do not indicate warnings or whether the system test has been performed. 
Only use the LEDs to provide basic information or as a backup when you are not using 
AdminBrowser.

Upon power up, the Expansion Hub goes through a five-second test to check the LED 
lamps. During this time, the LEDs blink through the states shown in Table 4-2, letting 
you visually verify that the LED lamps and the firmware are functioning properly.

NOTE: Refer to Section 9 for troubleshooting using the LEDs.

The Expansion Hub unit status and DL/UL status LEDs can be in one of the states 
shown in Table 4-1. These LEDs can be:

steady green

steady red

off 

Green / Green

Green / Green

• The Expansion Hub is connected to power and all power supplies are 

operating.

• The Expansion Hub is not reporting a fault or lockout condition; but 

the system test may need to be performed or a warning condition 
could exist (use AdminManager to determine this).

• Optical power received is above minimum (the Main Hub is con-

nected) although the cable optical loss may be greater than recom-
mended maximum.

• Optical power transmitted (uplink laser) is normal and communica-

tions with the Main Hub are normal.

Green / Green

Red / Green

• Optical power received is above minimum (the Main Hub is con-

nected) although the cable optical loss may be greater than recom-
mended maximum.

• Optical power transmitted (uplink laser) is normal and communica-

tions with the Main Hub are normal.

• The Expansion Hub is reporting a fault.