Troubleshooting
9-28
InterReach Unison Installation, Operation, and Reference Manual
CONFIDENTIAL
D-620003-0-20 Rev J
Expansion
Hub
Connected
LINK
Red
Use AdminManager to determine the
exact cause of the Main Hub’s faults.
Lost communication with Expansion
Hub; could be Expansion Hub problem
or fiber cable problem.
The Expansion Hub communication
problems delay MH responses to
AdminManager commands, resulting
in command time-outs. You can dis-
connect the offending Expansion Hub
initially to obtain status from the rest of
the system, then connect the Expansion
Hub and resolve the communication
problem.
E-HUB/RAU
Off
LINK
Green
The Expansion Hub or connected
RAU reports a fault condition; use
AdminManager to determine the
exact cause of the Expansion Hub
and RAU’s faults.
Degraded performance or unit may be
off-line.
Depends on fault condition.
E-HUB/RAU
Red
Table 9-11
Troubleshooting Main Hub Status LEDs During Normal Operation
During
Normal
Operation
Main Hub
Status
LEDs
State
Action
Impact
At Any
Time
MAIN HUB
STATUS
Red
Use AdminManager to determine the
exact cause of the fault.
Power cycle one time. If the fault
remains, replace the Main Hub.
Internal Main Hub fault.
Use AdminManager to check if the
Main Hub is commanded
Out-of-Service (every Expansion
Hub port status LED will be red as
well).
A power cycle will not clear a com-
manded Out-of-Service, you must
use AdminManager to clear this
state.
The Main Hub and all downstream
units are off-line.
MAIN HUB
STATUS
Alternating
Red/Green
Reduce input signal power.
Signal compression.
Table 9-10
Troubleshooting Main Hub Port LEDs During Normal Operation
During
Normal
Operation
Main Hub
Port LEDs
State
Action
Impact
Note: * applies to earlier firmware versions.
