Table 13. Hdsl Loop Signal Quality; Table 14. Adtran Noise Margin Guidelines - ADTRAN HDSL 3192 HTU-C Installation And Maintenance Practice

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 in
Measure
Predicting performance based upon signal quality varies with each loop. Generally, a noise
margin of 0 or higher supports a bit error rate or better the 10
that correspond to the operation of the 3192 HTU-C faceplate LEDs labeled LP1 and LP2 are
listed in Table 14.
Margin = 0
0 < Margin < 4
Margin > 4
61247004L1-5A

Table 13. HDSL Loop Signal Quality

Signal Quality
0
1-3 Marginal
>4 Excellent

Table 14. ADTRAN Noise Margin Guidelines

Margin LP1/LP2 LED
Red
Yellow
Green
Noise Margin
Poor
≤ 0 dB (≈10
above 10
≥ 4 dB above 10
Loop Quality
Poor Loop Quality
Marginal Loop Quality
Good Loop Quality
Menu Descriptions
Table 13.
–7 BER)
–7 BER in dB
–7 BER
-7 . ADTRAN defined guidelines
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