Computer And Telecommunications Revolution Will Bring Its Legal Problems

250 kg/km long span circular section cable, of 15.7 mm external diameter for installation on towers with spans up to 1000 m, and a 240 kg/km short span fig- ure of eight cable of 12 mm x 22 mm, suitable for mounting on pole routes with spans up to 100 m. The long span type has a working tension of 25 kN, while that for the short span cable is 5 kN. In the long span type, up to 24 optical fibres are carried in polymer tubes laid up with symmetrically disposed load bearing GRP rods, while for the short span a single GRP rod supports the op- tical fibres in their tubes. Attenuation of less than 0.5 dB/km at 1300 nm and dispersion of less than 6 ps/nm/km are quoted for single mode optical fibres. The standard drum lenght for both Fibrespan and Translite is 2 km but 4 km drums can be provided. The maxi- mum span for Fibrespan cable on nor- mal pylons in temperate climates would be 550 m, assuming the worst climatic condition to be 12.5 mm of radial ice and concurrent 88 km/h winds, alt...