It has been suggested that this article or section be merged with 19-inch rack . (Discuss)

A 23-inch rack is used for housing telephone (primarily), computer, audio and other equipment though is less common than the 19-inch rack. The size notes the width of the faceplate for the installed equipment. The rack unit is a measure of vertical spacing and is common to both the 19 and 23-inch (580 mm) racks.

Hole spacing is the same as for 19-inch (480 mm) racks.

Another name for this type of racks is "ETSI rack", relating to a standards body in telecommunications.

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