Two insulated wires, usually copper, twisted together and often bound into a common sheath to form multi-pair cables. In ISDN, these cables are the basic path between a subscriber’s terminal or telephone and the PBX or the central office.
Two insulated wires, usually copper, twisted together and often bound into a common sheath to form multi-pair cables. In ISDN, these cables are the basic path between a subscriber’s terminal or telephone and the PBX or the central office.
