EXFO VDSL2 - Manual (Page 87)

Copper, VDSL2, ADSL2+ and IP Triple-Play Test Set 79
4 POTS Auto Test
The purpose of the POTS Auto Test function is to detect the Loop Current
and measure the voice frequency in a copper telephone loop. This test
allows you to compare measured results against stored threshold values to
provide pass or fail status results of the POTS circuit type.
To access POTS Auto Test:
1. From the Home pane use the up/down arrow keys to highlight Fault
Isolation Tools and press .
2. Highlight POTS Auto Test and press to start the test.
To view POTS Auto Test tabs:
From the POTS Auto Test pane use the F1, F2, or F3 key to view the various
tabs.
Thresholds
The Thresholds tab allows you to set threshold values for the
POTS auto test.
Each parameter is described below:
³
Min Loop Current (mA) is a value
ranging from 10 to 100. Default
is 23.
³
Max Loss (dB) is a value ranging
from 0 to 50. Default is 8.
³
Max VF Power Influence is a value
ranging from -90 to 10 dBm with a
default of -10, if the ITU Standard is used. If ANSI Standard, the range is
from 0 to 100 dBrn with a default value of 80.
³
Max Noise Metallic is a value ranging from -90 to 10 dBm with a
default of -70, if the ITU Standard is used. If ANSI Standard, the range is
from 0 to 100 dBrn with a default value of 20.
³
Min Long Balance (dB) is a value ranging from 0 to 100. Default is 60.