19 inch 1U subrack for mounting up to eight DCCS2 modules, very high packing density: with RJ45 up to 48 ports, with LWL up to 48 x duplex couplings (96 fibers), sheet steel carrier black powder-coated, port numbering from 1 to 48, the port numbering is retained when installing DCCS2 twisted pair modules and DCCS2 LWL modules, grounding set included, backwards compatible with DCCS with little assembly effort, installation form: DCCS2, DCCS and double DCCS