Data Line Splitters - Outlet Doublers Slimline VersionMUST BE USED IN PAIRSScenario - one outlet in your office, and one at the patch panel. You want to add a network point without having to run a new cable. These splitters, used in pairs allow you to run two devices over one cableThey are generally used when running another UTP cable in your shop, office or home is not an option, or for temporary installationsThey work by using the 2 redundant pairs in the data line, because all data lines only use 2 pairs. This device connects the data through the two redundant pairsThey will not work with phones lines because phones use lines 4 and 5RJ45 Plug to 2 by RJ45 socket