The Netscale housing is mountable in 19-in racks or cabinets and provides user-friendly and flexible ultra high-density connectivity when combined with Netscale modules, cassettes, harnesses, trunks and Netscale patch cords. The elaborate design of Netscale housings includes drawers receiving modules or cassette from either the front or the rear. A fundamental design feature is the break-up of traditional RU-sizing. Netscale drawers are only 0.75RU high which allows the 3RU housing to host four of them and hence, increase the density.