User's Manual

Maintenance, Troubleshooting, and Technical Assistance PRELIMINARY
10-4 InterReach Unison User Guide and Reference Manual
PN 8700-10
620003-0 Rev. A
EHn uplink AGC
failure
STATUS
Red Uplink fiber has
high optical loss.
Measure UL optical fiber loss.
Clean the Main and Expan-
sion Hub’s uplink fiber ports.
The Main Hub’s EHn
port is off-line; down-
link is okay.
Main Hub uplink
port failure.
Move fiber pair to another
port. If fault is not reported,
fiber is okay and Main Hub
port is dirty or bad. Use the
AdminManager to ‘Clear All
Disconnect Status’ to clear the
disconnect fault on the origi-
nal port.
Main Hub internal
failure.
If common point of failure for
more than one Expansion
Hub, replace the Main Hub.
Expansion Hub
internal failure.
Swap suspect Expansion Hub
with working Expansion Hub.
If fault persists, replace Main
Hub; otherwise, replace the
Expansion Hub.
Table 10-1 Main Hub Faults (continued)
Fault Message LED State Possible Causes Action Impact