ADTRAN QDFR Unit Installation And Maintenance Practice

Contents

ADTRAN QDFR Unit Installation And Maintenance Practice Manual pdf 30 page image

Quad Fiber Remote (QDFR) Unit Installation and Maintenance Practice22 61181307L7-5ETroubleshooting MenuThe Troubleshooting menu (Figure 27) compiles information received from all facilities andequipment 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 MenuTroubleshooting Guidance ScreenThe Troubleshooting Guidance screen (Figure 28) analyzes this information and makes repairrecommendations. 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 ScreenShelf: 1 Slot: 11 Total Access System mm/dd/yy hh:mmUnacknowledged Alarms:TroubleshootingCurrently Active Previous 7 DaysCH 1 DSX-1 (Network) Rx OK OKCH 1 DS1 (Customer) Rx LOS LOSCH 2 DSX-1 (Network) Rx OK OKCH 2 DS1 (Customer) Rx LOS LOSCH 3 DSX-1 (Network) Rx OK OKCH 3 DS1 (Customer) Rx LOS LOSCH 4 DSX-1 (Network) Rx OK OKCH 4 DS1 (Customer) Rx LOS LOSQDFC Loop LOS LOSQDFR Loop LOS LOS1. Troubleshooting Guidance 4. Performance History2. Definitions 5. Alarm History3. Detailed Status R. Restart history for this screenSelection:Shelf: 1 Slot: 15 Total Access System mm/dd/yy hh:mmUnacknowledged Alarms:Fiber Loss of Sync- A Fiber Loss of Sync (FLOS) condition (OPT LED is solid Red) indicates thatend-to-end fiber synchronization does not exist between the fiber devices on agiven loop. The problem can exist for any number of reasons, but is most likelyrelated to some kind of loop fault.- The condition could be related to a new installation where the fieldequipment has not yet been installed (or it has been removed in error), but itcould 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 bytemporarily connecting an QDFR Remote at the network side of the loop. Ifthe open condition clears, i.e., the FLOS indication goes away (OPT LED isextinguished), the problem is beyond that point.