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Quad Fiber Remote (QDFR) Unit Installation and Maintenance Practice
22 61181307L7-5E
Troubleshooting Menu
The Troubleshooting menu (Figure 27) compiles information received from all facilities and
equipment in the circuit and presents them in both Real-Time and 7-Day historical format.
The Definitions option from this menu provides definitions of terms and acronyms.
Figure 27. Troubleshooting Menu
Troubleshooting Guidance Screen
The Troubleshooting Guidance screen (Figure 28) analyzes this information and makes repair
recommendations. The QDFR reads the operational status of the unit and returns Trouble-
shooting Guidance, or hints, as to the probable cause of the trouble.
Figure 28. Troubleshooting Guidance Screen
Shelf: 1 Slot: 11 Total Access System mm/dd/yy hh:mm
Unacknowledged Alarms:
Troubleshooting
Currently Active Previous 7 Days
CH 1 DSX-1 (Network) Rx OK OK
CH 1 DS1 (Customer) Rx LOS LOS
CH 2 DSX-1 (Network) Rx OK OK
CH 2 DS1 (Customer) Rx LOS LOS
CH 3 DSX-1 (Network) Rx OK OK
CH 3 DS1 (Customer) Rx LOS LOS
CH 4 DSX-1 (Network) Rx OK OK
CH 4 DS1 (Customer) Rx LOS LOS
QDFC Loop LOS LOS
QDFR Loop LOS LOS
1. Troubleshooting Guidance 4. Performance History
2. Definitions 5. Alarm History
3. Detailed Status R. Restart history for this screen
Selection:
Shelf: 1 Slot: 15 Total Access System mm/dd/yy hh:mm
Unacknowledged Alarms:
Fiber Loss of Sync
- A Fiber Loss of Sync (FLOS) condition (OPT LED is solid Red) indicates that
end-to-end fiber synchronization does not exist between the fiber devices on a
given loop. The problem can exist for any number of reasons, but is most likely
related to some kind of loop fault.
- The condition could be related to a new installation where the field
equipment has not yet been installed (or it has been removed in error), but it
could also be related to a continuity problem due to facility trouble.
- If the condition is not due to the lack of termination, clear the office by
temporarily connecting an QDFR Remote at the network side of the loop. If
the open condition clears, i.e., the FLOS indication goes away (OPT LED is
extinguished), the problem is beyond that point.