User's Manual

Table Of Contents
Help Hot Line (U.S. only): 1-800-530-9960 9-9
D-620616-0-20 Rev F CONFIDENTIAL
Troubleshooting
Table 9-4 Troubleshooting Expansion Hub Status LEDs During Normal
Operation
During
Normal
Operation
Expansion
Hub
Status
LEDs State Action Impact
At Any Time
UL STATUS
Red Check uplink fiber for optical loss.
Power cycle Expansion Hub one
time to check uplink laser.
No communications between the Main
Hub and the Expansion Hub.
Uplink laser failure.
DL STATUS
Red Check the downlink fiber for opti-
cal loss
No communications with the Main Hub.
E-H
STATUS
Red If either the UL STATUS or the DL
STATUS
are also red, see above.
Cycle power on the Expansion
Hub. If fault remains, replace the
Expansion Hub.
Internal Expansion Hub fault (including
either of the above
UL STATUS or DL
STATUS
states).