1.solid annealed copper conductor 2.HDPE insulation 3.Jelly filled 4.PE sheath 5.Galvanized steel wire

outdoor telephone cable,jelly filled telephone cable,telephone cable

Application of outdoor telephone cable :

Aerial telephone cable hangs between pillars, used for connection from local telephone exchange or subcriber central to connection boxes used indoor and outdoor by installed on the wall or fixed on electric pole

Construction of  outdoor telephone cable:

1.solid annealed copper conductor

2.HDPE insulation

3.Jelly filled

4.PE sheath

5.Galvanized steel wire

Specification of outdoor telephone cable:

Pairs No. from 4 to 400

Conductor diameter from 0.4mm to 0.9mm

Some Technical data of outdoor telephone cable:

a.Conductor resistance at 20°C

   139Ω/km(0.4mm conductor)

   88.7Ω,/km(0.5mm conductor)

   52.5Ω/km(0.65mm conductor)

   27.4Ω/km(0.9mm conductor)

b.Unbalance resistor at 20°C

    2.0%(0.4mm conductor)

    1.5%(0.5mm  condcutor)

    1.5%(0.65mm conductor)

    1.5%(0.9mm conductor)

c.Transmission attenuation at 20°C  when at 1KHz

   1.85±3%dB/km(0.4mm conductor)

   1.44±3%dB/km(0.5mm conductor)

   1.13±3%dB/km(0.65mm conductor)

   0.82± 3%dB/km(0.9mm conductor)

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