A 200-meter (or approx. 218-yard) 2-pair (4-core) telephone cable is standard for wiring internal analog phones, intercom systems, and PABX networks. In the Ikeja and Lagos areas, .Core Technical SpecificationsCable Type: CW1308/CAT3 specification, twisted pairConductor Diameter: Typically 0.5 mmNumber of Cores: 4 cores (2 pairs)Color Coding:Pair 1: Blue & Blue/WhitePair 2: Orange & Orange/WhiteInsulation & Jacket: PVC or PE insulation with a tough outer protective sheath