User's Manual

PN 8700-10 Help Hot Line (U.S. only): 1-800-530-9960 10-5
620003-0 Rev. A
PRELIMINARY Fault Indications
No communica-
tion with EHn
LINK Red Downlink fiber has
high optical loss.
Measure downlink optical
fiber loss.
Clean the Expansion Hub’s
downlink fiber port.
Clean the Main Hub’s down-
link fiber port.
EHn and connected
RAUs are off-line.
E-HUB/
RAU
Off
Uplink fiber has
high optical loss
Measure uplink optical fiber
loss.
Clean uplink fiber connectors.
Clean uplink fiber ports.
Main Hub down-
link port failure.
Move the Main Hub fiber pair
to another port. If fault is not
reported, fiber is okay and the
Main Hub port is bad. Use the
AdminManager’s “Clear All
Disconnect Status” command
to clear the disconnect fault on
the original port.
Main Hub internal
failure.
If common point of failure for
more than one Expansion
Hub, replace the Main Hub.
Expansion Hub
downlink port fail-
ure.
Swap suspect Expansion Hub
with working Expansion Hub.
If fault persists, replace the
Main Hub; otherwise, replace
the Expansion Hub.
EHn disconnected
LINK Red The Expansion Hub
was connected and
is now discon-
nected.
If EHn is disconnected, recon-
nect it or clear the disconnect
fault using the AdminMan-
ager’s “Clear All Disconnect
Status” command.
EHn and connected
RAUs are off-line.
E-HUB/
RAU
Off
The uplink fiber
optical loss exceeds
minimum threshold.
Check the uplink fiber cable’s
optical loss.
Clean the uplink fiber connec-
tors.
Clean the Main and Expan-
sion Hubs’ uplink ports.
Expansion Hub
uplink laser failure.
Check that EHn’s uplink laser
is operational. (
UL STATUS
LED is green.)
Table 10-1 Main Hub Faults (continued)
Fault Message LED State Possible Causes Action Impact