ADTRAN DE-4E Installation And Maintenance Manual

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ADTRAN DE-4E Installation And Maintenance Manual Manual pdf 9 page image

9Section 61245207L2-5, Issue 261245207L2-5CThe Current System Status Screen, illustrated inFigure 8, provides quick access to FT1 DP statusinformation.The Elapsed Time display indicates the period of timesince the unit began collecting performanceinformation. At each 15-minute interval, theperformance information is transferred to the15-minute performance data registers accessed fromthe Performance History screen. At each 24-hourinterval, the performance data is transferred into the24-hour performance data register also accessed usingthis screen.Figure 8 consolidates current information for the DSLand DS1 interfaces. A key to the informationprovided is found in the center of the screen. Arrowsindicate the key applies to the FT1 DP. The followingdefines terms used on this screen:LOSS ....................... Pulse AttenuationMeasurementSYNC ...................... DSL Loop 1 Sync StatusES 15M/24H ............ Errored SecondsSES 15M/24H .......... Severely Errored SecondsUAS 15M/24H ......... Unavailable SecondsFigure 8. Current System Status ScreenFT1-DP CURRENT SYSTEM STATUS FNIDNETWORK (DSL) ELAPSED TIME 00:08:18 CUSTOMER (DSL)----------------------- -------------------00 dB <- LOSS -> 00 dBNO <- SYNC -> NO000/00000 <- ES 15M/24H -> 000/00000000/00000 <- SES 15M/24H -> 000/00000498/00498 <- UAS 15M/24H -> 498/00498LOOPBACKS INACTIVE LOOPBACKS INACTIVEFT1-DP SIGNAL QUALITY FNID DS1 FNID SIGNAL QUALITY[ ] 9 -------------------- [ ] 9[ ] 8 FRAME ——> SF [ ] 8[ ] 7 CODE ——> AMI [ ] 7[ ] 6 LBO ——> 0 dB [ ] 6[ ] 5 BPV ——> 00000 [ ] 5[ ] 4 ES ——> 00000 [ ] 4[ ] 3 SES ——> 00000 [ ] 3[ ] 2 UAS ——> 00000 [ ] 2[ ] 1 ALARMS ——> NONE [ ] 1[ ] 0 NO SEALING CURRENT [ ] 0Press “Z” to zero registers, “M” for Main Menu.NOTEThe first number is for the current 15-minuteperiod. The second number is for the current24-hour period.A measure of signal quality for each DSL loop isgraphically depicted on the bottom right and left of thescreen. The measure is from 0 to 9 (poor to excellentsignal quality). Guidelines for interpreting theindicators are:0 ......... Poor signal quality. Noise margin is ≤ 0 dB(≈10 -7 BER).1-8 ...... Margin measurement above 10 -7 BER in dB.9 ......... Excellent signal quality. Margin is ≥ 9 dBabove 10-7 BER.Predicting performance based upon signal qualityvaries with each loop. Generally, a noise margin of0 dB or higher will support a bit error rate (BER) ofbetter than 10 -7.Type “Z” at the Current System Status screen in orderto reset performance registers to zero at both theCurrent System Status and Performance Historyscreens.