Extra pairs and colors: spurious comma← Previous revisionRevision as of 23:35, 23 October 2026 Line 251: Line 251: == Extra pairs and colors == == Extra pairs and colors == [[File:Addl-Pairs.jpg|thumb|Colors of additional pairs in multi-pair cable as per Bell Standards]] [[File:Addl-Pairs.jpg|thumb|Colors of additional pairs in multi-pair cable as per Bell Standards]] When working on aerial cable splicing and installation, it is common to use a [[Lineman's handset|telephone lineman's set]] or "butt set" to communicate over long distances. To facilitate this, extra pairs of wires are embedded in cables using "major" colors for both wires (instead of the major/minor color combinations used for the rest). One extra pair (red-white) may be embedded into cables that are 6 to 75 pairs; two pairs (red-white and black-white) may be encapsulated in cables of 100 to 300 pairs; and three pairs (red-white, black-white, and yellow-white) may be included in cables of 400 to 900 pairs. These extra pairs are often referred to as "talk pairs", and are never used for subscriber service. When working on aerial cable splicing and installation, it is common to use a [[Lineman's handset|telephone lineman's set]] or "butt set" to communicate over long distances. To facilitate this, extra pairs of wires are embedded in cables using "major" colors for both wires (instead of the major/minor color combinations used for the rest). One extra pair (red-white) may be embedded into cables that are 6 to 75 pairs; two pairs (red-white and black-white) may be encapsulated in cables of 100 to 300 pairs; and three pairs (red-white, black-white, and yellow-white) may be included in cables of 400 to 900 pairs. These extra pairs are often referred to as "talk pairs" and are never used for subscriber service. ==Other color codings== ==Other color codings==