ADTRAN DE-4E, Руководство по установке и обслуживанию

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9 Section 61245207L2-5, Issue 2 61245207L2-5C
The Current System Status Screen, illustrated in
Figure 8
, provides quick access to FT1 DP status
information.
The Elapsed Time display indicates the period of time
since the unit began collecting performance
information. At each 15-minute interval, the
performance information is transferred to the
15-minute performance data registers accessed from
the Performance History screen. At each 24-hour
interval, the performance data is transferred into the
24-hour performance data register also accessed using
this screen.
Figure 8 consolidates current information for the DSL
and DS1 interfaces. A key to the information
provided is found in the center of the screen. Arrows
indicate the key applies to the FT1 DP. The following
defines terms used on this screen:
LOSS ....................... Pulse Attenuation
Measurement
SYNC ...................... DSL Loop 1 Sync Status
ES 15M/24H ............ Errored Seconds
SES 15M/24H .......... Severely Errored Seconds
UAS 15M/24H ......... Unavailable Seconds
Figure 8. Current System Status Screen
FT1-DP CURRENT SYSTEM STATUS FNID
NETWORK (DSL) ELAPSED TIME 00:08:18 CUSTOMER (DSL)
----------------------- -------------------
00 dB <- LOSS -> 00 dB
NO <- SYNC -> NO
000/00000 <- ES 15M/24H -> 000/00000
000/00000 <- SES 15M/24H -> 000/00000
498/00498 <- UAS 15M/24H -> 498/00498
LOOPBACKS INACTIVE LOOPBACKS INACTIVE
FT1-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 [ ] 0
Press “Z” to zero registers, “M” for Main Menu.
NOTE
The first number is for the current 15-minute
period. The second number is for the current
24-hour period.
A measure of signal quality for each DSL loop is
graphically depicted on the bottom right and left of the
screen. The measure is from 0 to 9 (poor to excellent
signal quality). Guidelines for interpreting the
indicators 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 dB
above 10 -7 BER.
Predicting performance based upon signal quality
varies with each loop. Generally, a noise margin of
0 dB or higher will support a bit error rate (BER) of
better than 10
-7
.
Type “Z” at the Current System Status screen in order
to reset performance registers to zero at both the
Current System Status and Performance History
screens.