Leviton® 110-style cross connect wiring products are used in building entrance facilities, telecommunications closets and equipment rooms to provide fixed cross connections for voice, security and data applications, including high megabit applications when used with Cat 5e rated cabling. Wall version mounts to walls or backboards in 50, 100 or 300-pair densities. Rack version mounts on 19 in distribution frames or hinged wall mount brackets.