Digital communication telephone line(Indoor)

Conductor              O.F.C bare copper wire(BC) solid or intertwist

Insulation                HDPE or PVC

Shield                     (Shield) aluminium foil spiral or vertial wrap aluminium foil and plait

Shead                     White or blue PVC

Standard                 YD/T 840-1996

Application              Cable adopt style of pair twisting or star twisting, it is applied to link between

                         floor rack wiring of telephone communications cabling system and export

                         residence for user's telephone. It is applied to link between SPC exchange and

                         extension telephone and other communication equipment. It is used for

                         telephone user terminal, fax, digital telephone and Building visible interphone

                         system. Shielded telephone communication cables are used in cabling system of

                         more serious environmental disturbance area.