ADTRAN HTU-C NB Installation And Maintenance Practice page 25

An indication of pair reversal (if present) appears at the bottom of the first key column. Status
and configuration information for the DS1 and DSX-1 signals are located in the center of the
screen near the bottom.
items.
Table 8. Status and Configuration Key Definitions
Indicator
FRAME
CODE
LBO
NIU
BPV
ES
SES
UAS
Alarms
A measure of signal quality (current/minimum/maximum) for each HDSL loop is displayed on
the Current System Status Screen. The noise margin is measure in dB above the 10
Table 9 describes the noise margin quality levels and their indicators.
Margin (in dB)
<0
0–2
>2
61247002L1-5A
Table 8 gives the definitions of the status and configuration key
Definition
T1 framing format selected
T1 line coded selected
Line build-out selected (for DSX-1), Customer signal of 0 or –15 dB
(for DS1)
Network interface unit enabled
Bipolar violations detected (DSX-1 and DS1)
Errored seconds (DSX-1 and DS1)
Severely errored seconds (DSX-1 and DS1)
Unavailable seconds (DSX-1 and DS1)
Lists current alarm condition status
Table 9. Noise Margin Quality
LED Color
Yellow
Green
Red
Menu Descriptions
–7 BER.
Loop Quality
Poor
Marginal
Good
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