User's Manual

Maintenance, Troubleshooting, and Technical Assistance PRELIMINARY
10-16 InterReach Unison User Guide and Reference Manual
PN 8700-10
620003-0 Rev. A
Table 10-10 Troubleshooting Expansion Hub Status LEDs During Normal
Operation
During
Normal
Operation
EH Status
LEDs State Action Impact
At Any Time
UL STATUS
Red Replace the Expansion Hub Uplink laser failure; no communications
between the Main Hub and the Expansion
Hub
DL STATUS
Red Check the downlink fiber for opti-
cal loss
No communications with the Main Hub
E-HUB
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)