DIN Standard DIN 47100 regulated the color-coding for the identification of cores in telecommunication cables.
The standard was withdrawn without a replacement in November 1998, but remains in widespread use by cable manufacturers.
The isolations of the several wires in a cable are either solidly colored in one color, or striped lengthwise in two colors.
Use of the three-colored wires numbered 45 and up is rare.
This standards- or measurement-related article is a stub.