Actelis Networks ML700 - Copper Lines Testing

Troubleshooting Copper Line Troubleshooting
15-12 User Manual ML700
Table 91: Descriptions
Test
Description
Line-impairment Test
It is always a good practice to verify that all cable pairs are fault free.
Good continuity between the two Actelis systems ensures optimal
performance of the system.
Procedure: Use TIMS and follow standard telco operating procedures to
ensure that all copper facilities are free from physical and electrical faults,
such as: opens, splits, grounds, and load coils.
Crosstalk Test
Use the line tester to transmit a signal with the following characteristics
over one of the lines and examine the signal on all adjacent lines:
 Transmit level +13 dBm;
 Transmit frequencies 80 kHz, 160 kHz, 196 or 320 kHz;
 Transmit and receive impedance 135 Ohm.
 Test the lines at any required frequency.
Expected results: For optimum HSL performance, the crosstalk test
results should be for twisted pairs (not Quad cables) as follows:
If the test result is 10 dB less than the level specified in the previous table,
the line should not be used.
Transmit Frequency (kHz)
Isolation (Attenuation)
80
 67 dB
160
60 dB
196
58 dB
320
53 dB
Noise-to-ground Test
This test ensures that the lines can withstand signal interferences from
electrical sources, such as radio stations, transformers, electric motors and
power lines.
Procedure: Follow the instructions in your line-tester documentation to
test the lines for an input impedance of 135 Ohm. Make sure that the
sleeve or shield of the cable for the lines you are testing is grounded to an
earth-ground point.
Expected result: The noise-to-ground test result should be  54 dBrn.