MRJ21 connectors are high-density input/output copper cabling connectors. These provide density and space savings for current 10/100 and GbE RJ45 and RJ21 applications. These feature increased I/O port density and cleaner cabling schemes compared to RJ45 connectors, with one and a half to three times the port density of RJ45 connectors and three times the port density of an RJ21 connector. MRJ21 connectors feature a dense CHAMP connector style double blade design with offset jackscrews for positive connection. MRJ21 connectors are designed to work with plug-and-play areas, including data centers, open offices, and zone cabled environments. These can be used in numerous network applications, including Gigabit Ethernet switches, network closets, digital cross connects, core and edge routers, Power over Ethernet (PoE), Voice over Internet Protocol (VoIP), and wherever RJ45 mod plugs are used.