IEC 61156-4-1 pdf download Multicore and symmetrical pair/quad cables for digital communications – Part 4-1: Riser cables – Blank detail specification This blank detail specification relates to multicore and symmetrical pair/quad cables for digitalcommunications in riser application. This blank detail specification determines the layout and style for detail specifications describing multicore and symmetrical pair(s)/quad(s) cables for digital communication in riserwiring....