Cat5E splitters enables two different devices to share the same cable. They are usually used in pairs, one at the outlet and one at the patch panel. Several wiring configurations are available to split the four pairs to suit different applications.
Type 8 wiring splits a 4 pair T568A568B plug, pair 2&3 to jack 1 and pair 1&4 to Jack 2 for 100BaseT (jack1) and Token Ring or voice application (jack 2).