ADC Telecommunications Inc. F0684-112 Manual Do Utilizador

3-7

CONFIDENTIAL

The Main Hub has one fiber port LED for each of the four fiber ports. The LED can 
be in one of the states shown in Table 3-2. This LED can be:

off

steady green

steady red

flashing red (60 ppm)

Green

Red 
(60-ppm)

• The Main Hub is connected to power and all power supplies are operating.

• The Main Hub DL input signal level is too high.

Red

Red

• One or more power supplies are out-of-specification.

Green

Red/Green 
(alternating)

• After the System CPU is rebooted, the MH status LED blinks red/green 

while the system tree data is built, power up system test is executed, and all 
units have their current status updated. 

• Should the MH status LED blink red/green after initial power up, either the 

System CPU has rebooted or a component of the software has reset.

Off

• The Expansion Hub is not connected.

Green

• The Expansion Hub is connected.

• There are no faults from the Expansion Hub or any connected RAU.

Red 
(60 PPM)

• There was a loss of communications with the Expansion Hub.

Red 
(Steady)

• The Expansion Hub is disconnected.

• The Expansion Hub or any connected RAU reported a fault.

Green 
(60-ppm)

• The Expansion Hub or any connected RAU reported a lockout condition.