Talk:20-pair colour code (Australia)

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This colour coding system is also in use in the UK (I first encountered it there) and most likely has been used in other former British colonies. There is probably scope for moving this to a more general discussion of telecommunication wire colour coding systems.

A page that discusses this coding system in a UK context is: http://www.dfrtelecoms.org.uk/number.htm

I cannot immediately find any suitable "parent" page for this page, however.

This long-used system can be found documented in what was for many years the definitive two-volume set on the British system, "Telephony" by Atkinson. And as another commenter has said, it is to be deprecated that even some "official" documents now talk about grey rather than slate, which is what it always used to be called. American (at least Bell System) usage tended toward two-letter abbreviations: BL, OR, GN, BN, SL / WH, RD, BK, YW, VT. British G.P.O. practice used single letters except where a second letter was needed for differentiation: B, O, G, BN, S / W, R, BK, Y, V. 97.86.156.248 (talk) 00:46, 12 April 2018 (UTC)[reply]