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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.
HTU-C
LOOP #1 <NETWORK> LOOP #2
-------------------------
00 dB
YES
000/00000
000/00000
000/00000
LOOPBACKS INACTIVE
HTU-C SIGNAL QUALITY
[X]
9
L[X]
8
O[X]
7
O[X]
6
P[X]
5
[X]
4
1[X]
3
[X]
2
[X]
1
[X]
0
61245023L1-5B
CURRENT SYSTEM STATUS
ELAPSED TIME 00:00:00
00 dB
<-
YES
<-
000/00000
<- ES
000/00000
<- SES
000/00000
<- UAS
DSX-1
[X]
------------------------------
L[X]
ESF
<-
O[X]
B8ZS
<-
O[X]
0-133
<-
P[X]
N/A
<-
[X]
00000
<-
2[X]
00000
<-
[X]
00000
<-
[X]
00000
<-
[X]
RED
<- ALARMS ->
Press "Z" to zero registers, "M" for Main Menu.
Figure 9. Current System Status Screen
Section 61245023L1-5B, Issue 2
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
0 ................. Poor ................... ≤ 0 dB (≈ 10
1-8 .............. Marginal ............ above 10
9 ................. Excellent ............ ≥ 9 dB above 10
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
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
LOOP #1 <CUSTOMER>LOOP #2
-------------------------
LOSS
->
01 dB
SYNC
->
YES
15M/24H ->
000/00000
15M/24H ->
000/00000
15M/24H ->
000/00000
LOOPBACKS INACTIVE
DS1
HTU-R SIGNAL QUALITY
FRAME ->
ESF
CODE
->
B8ZS
LBO
->
N/A
NIU
->
YES
BPV
->
00000
ES
->
00000
SES
->
00000
UAS
->
00000
NONE
Noise Margin
–7
BER)
–7
BER in dB
-7
HTU-R
02 dB
YES
000/00000
000/00000
000/00000
[X]
9
[X]
L[X]
8
L[X]
O[X]
7
O[X]
O[X]
6
O[X]
P[X]
5
P[X]
[X]
4
[X]
1[X]
3
2[X]
[X]
2
[X]
[X]
1
[X]
[X]
0
[X]
BER
–7
.
11
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