61245023L1-5B
Section 61245023L1-5B, Issue 2
11
The Current System Status Screen, illustrated in
Figure 9
provides quick access to status information
for both the HTU-C and Nx64 HTU-R. Type the
letter “H” at the Current System Status Screen to
view the HRE screen.
Type the letter “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.
Figure 9
consolidates current information for the
HDSL interface. A key to the information provided
appears in the center of the screen.
LOSS ................ Pulse Attenuation Measurement
SYNC ............... HDSL Loop 1 and Loop 2 Sync
Status
ES 15M/24H .... Errored Seconds
SES 15M/24H .. Severely Errored Seconds
UAS 15M/24H . Unavailable Seconds
Status and configuration information for the signal
is located in the center of the screen near the
bottom.
A measure of signal quality for each HDSL loop
appears on the bottom right and left of the screen.
Guidelines for interpreting the measure indicators
are given below.
Measure
Signal Quality
Noise Margin
0 ................. Poor ...................
≤
0 dB (
≈
10
–7
BER)
1-8 .............. Marginal ............ above 10
–7
BER in dB
9 ................. Excellent ............
≥
9 dB above 10
-7
BER
Predicting performance based upon signal quality
varies with each loop. Generally, a noise margin of
0 or higher will support a BER of better than 10
–7
.
ADTRAN defines the following as guidelines that
correspond to the operation of the NTU faceplate
LEDs labeled LP1 and LP2.
Margin < 0 ...... Poor Signal Quality
0
≤
Margin
≤
2 Marginal Loop Quality
Margin > 2 ...... Good Loop Quality
Figure 9. Current System Status Screen
HTU-C CURRENT SYSTEM STATUS HTU-R
LOOP #1 <NETWORK> LOOP #2 ELAPSED TIME 00:00:00 LOOP #1 <CUSTOMER>LOOP #2
------------------------- -------------------------
00 dB 00 dB <- LOSS -> 01 dB 02 dB
YES YES <- SYNC -> YES YES
000/00000 000/00000 <- ES 15M/24H -> 000/00000 000/00000
000/00000 000/00000 <- SES 15M/24H -> 000/00000 000/00000
000/00000 000/00000 <- UAS 15M/24H -> 000/00000 000/00000
LOOPBACKS INACTIVE LOOPBACKS INACTIVE
HTU-C SIGNAL QUALITY DSX-1 DS1 HTU-R SIGNAL QUALITY
[X] 9 [X] ------------------------------ [X] 9 [X]
L[X] 8 L[X] ESF <- FRAME -> ESF L[X] 8 L[X]
O[X] 7 O[X] B8ZS <- CODE -> B8ZS O[X] 7 O[X]
O[X] 6 O[X] 0-133 <- LBO -> N/A O[X] 6 O[X]
P[X] 5 P[X] N/A <- NIU -> YES P[X] 5 P[X]
[X] 4 [X] 00000 <- BPV -> 00000 [X] 4 [X]
1[X] 3 2[X] 00000 <- ES -> 00000 1[X] 3 2[X]
[X] 2 [X] 00000 <- SES -> 00000 [X] 2 [X]
[X] 1 [X] 00000 <- UAS -> 00000 [X] 1 [X]
[X] 0 [X] RED <- ALARMS -> NONE [X] 0 [X]
Press “Z” to zero registers, “M” for Main Menu.
