Cable Matters 2-Pack RJ45 Splitter Ethernet Cable Share Kit in White (Must Be Used in Pairs, One Unit On Each End of an Ethernet Cable Run) RJ45 SPLITTER KIT splits the cable pairs on an existing Cat 5/5e/6 cable into two separate outlets to connect two devices such as a computer or printer; Connect the other end to TWO DEDICATED router or switch ports; Each device requires a separate network port CABLE SHARING KIT is an ideal solution for connecting two devices in a remote location with an existing network cable drop; Check that all four pairs are terminated into the wall outlet; Alternatively, use a long Ethernet patch cable with female RJ45 couplers (sold separately) at each end as a solution for locations without any network cabling VOIP SHARED APPLICATION in an office location that needs to add an IP phone next to a computer that can run on shared 100Mb (Fast Ethernet) speeds over Cat 5e; Requires separate ports on a network switch; PoE is not a recommended use ETHERNET CABLE SPLITTER splits pairs 2 & 3 into Jack 1 and pairs 1 & 4 into Jack 2 for sharing two device signals over a single cable; Each device requires a dedicated router or switch port CONNECTION CHECK LIST includes an 1) Ethernet Cat 5/5e/6 cable with all 4 pairs connected; 2) Cable terminated into a wall plate or connected with a female RJ45 coupler; 3) Four Ethernet patch cords (2 at each end); 4) Two available ports on the Ethernet router or switch