scope:

Refers to HD 608 S1:1992, Generic specification for symmetrical pair/quad or multicore cables for digital communications. It covers individually screened or unscreened pair(s) or quad(s) in cables for vertical shafts or certically between floors (riser backbone cables) or in horizontal between buildings (campus backbone cables). In the same cable both screened and unscreened elements may be used. When installed vertically extra strength requirements may be applicable and are defined in the detail specifications. The cables shall be provided with a common overall screen. These cables are suitable for different communiation systems to which reference is made in the detail specifications. The cables covered by this specification are intended to operate with voltages and currents normally adopted for communication systems. These cables shall not be connected to low impedance sources, for example, the public mains electricity supply.