ADC Telecommunications Inc. F0694-011 Benutzerhandbuch

7-31

CONFIDENTIAL

• All Expansion Hub 

 LEDs with RAUs connected should indicate Green/Red. 

This indicates that the RAU is powered on and communication has been estab-
lished.

• The Expansion Hub 

 LED should be Green.

Expansion 
Hub power 
is On and no 
RAUs are 
connected

Off

Check AC power; make sure the 
Expansion Hub power-on switch 
is on; replace the Expansion Hub.

The Expansion Hub is not 
powering on.

LEDs are on but 
didn’t blink through 
all states.

Replace the Expansion Hub.

The Microcontroller is not 
resetting properly; flash 
memory corrupted.

Flashing Red 
(6 PPM)

Port unusable; replace the Expan-
sion Hub when possible.

Current sensor fault; do not 
use the port.

Red, after power-up 
blink

Replace the Expansion Hub.

The Expansion Hub laser is 
not operational; no uplink 
between the Expansion Hub 
and Main Hub.

Red

Check the Main Hub LEDs
Refer to page 7-24, item 2 in 
Table 7-5.

Use AdminBrowser to determine 
the problem.

No communication with 
Main Hub.

Red

Check the downlink fiber for opti-
cal power; verify that the cables 
are connected to correct ports 
(that is, uplink/downlink)

Check the Main Hub LEDs. Refer 
to page 7-24, item 2 in Table 7-5.

No downlink between the 
Expansion Hub and Main 
Hub.

Expansion 
Hub power 
is On and 
RAUs are 
connected

Off

Check the CATV cable.

Power is not getting to the 
RAU.

Flashing Red 
(60 PPM)

Test the CATV cable. If the cable 
tests OK, try another port. If the 
second port’s LEDs are Red/Off, 
replace the RAU. If the second 
RAU doesn’t work; replace the 
Expansion Hub.

Power levels to RAU are not 
correct; communications are 
not established.

If the second port works, flag 
the first port as unusable; 
replace EH when possible.

Red

Use AdminBrowser to determine 
the problem.

RAU is off-line.