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Telephone Cable, Communication Cable, Network Cable
Specifications | Measurement unit | Conductor size (mm) | ||||
0.4 | 0.5 | 0.65 | 0.9 | |||
Electricity indicators | ||||||
Conductor resistance at 20oC | Ohm/km | |||||
Average value | Ohm/km | 139 | 88.7 | 52.5 | 27.4 | |
Maximum distinctive value | Ohm/km | 147 | 93.5 | 56.5 | 29 | |
Average value | Ohm/km | 2 | 1.5 | 1.5 | 1.5 | |
Maximum distinctive value | Ohm/km | 5 | 5 | 4 | 4 | |
Operating capacitance at 20oC | nF/km | |||||
Average value | ||||||
Less than12 pairs | nF/km | 52 ± 4 | ||||
More than12 pairs | nF/km | 52 ± 2 | ||||
Maximum distinctive value | nF/km | |||||
Less than12 pairs | nF/km | ≤ 58 | ||||
More than12 pairs | nF/km | ≤ 57 | ||||
Transmission attenuation at 20oC | dB/km | |||||
At 1 KHz | dB/km | 1.85 ± 3% | 1.44 ± 3% | 1.13 ± 3% | 0.82 ± 3% | |
At 150 KHz | dB/km | 12.3 | 8.9 | 6 | 5.4 | |
At 772 KHz | dB/km | 23.6 | 19.8 | 13.9 | 12 | |
Crosstalk attenuation at far end at20oC | dB/km | |||||
At 150 KHz | dB/km | 52/56 | 52/58 | 52/57 | 54/60 | |
At 772 KHz | dB/km | 38/42 | 38/44 | 38/44 | 40/46 | |
Crosstalk attenuation at near end at20oC | dB/km | |||||
At 150 KHz | dB/km | 53/58 | 53/58 | 53/58 | 53/58 | |
At 772 KHz | dB/km | 42/47 | 42/47 | 42/47 | 42/47 |