For use in exchange and campus areas, supported by a pre-installed messenger. Suitable for voice frequency, both analog and digital, on a selected pair assignment basis Specifications: Solid, annealed, bare copper conductors Solid polyolefin conductor insulation color-coded to telephone industry standards Insulated conductors are twisted into pairs of varying lengths of lay to minimize crosstalk Pairs are stranded into units (and super units if required by pair count) and the resultant cable core is covered with a non-hygroscopic tape. In cable sizes of 1,200 pair and greater, a mirror-image super unit-color-code system is adopted The ALPETH cable sheath consists of 0.008 in., corrugated, aluminum shield and a black polyethylene jacket. The jacket is sequentially printed with a footage marker at regular intervals Tech. Info & Standards Cable conforms to Bellcore specifications Product Sheet: Spec Sheet