Multi-element metallic cables used in analogue and digital communication and control. Sectional specification for screened cables characterised up to 600 MHz. Horizontal and building backbone cables|Performance, Multicore cables, Circuit networks, Data transmission, Computer networks, Electric control equipment, Communication cables, Communication transmission lines, Horizontal, Insulated cables, Communication networks, Digital signals, Cable sheaths, Buildings, Frequencies, Sheathed cables, Communication equipment, Analogue signals, Metals, Electric cables, Shielded cables, Performance testing