Measuring dc loop resistance, See table 43 on, Table 44 on – Nortel Networks M3110 User Manual
Page 306: D table 43 on
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Page 306 of 504
Digital telephones line engineering
553-3001-367 Standard 3.00 August 2005
Measuring DC Loop Resistance
Measure DC loop resistance by using standard procedures.
Note: The DC loop resistance limit of 175 ohm should be reduced by
1 ohm for each one percent of the total loop that is aerial cable.
Table 43
Attenuation at 256 kHz for U/C cable
WE 4-pair
AMP 25-pair
dB/kft
dB/km
dB/kft
dB/km
4.6
15.3
19.0
63.3
Table 44
Attenuation at 256 kHz for D inside wiring cable
NT
WE
Superior
General
dB/kft
dB/km
dB/kft
dB/km
dB/kft
dB/km
dB/kft
dB/km
4.0
13.3
3.2
10.7
3.7
13.3
4.6
15.3
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