At the network side (router or switch): You plug the splitter into two open ports. The splitter “combines” those two connections into one physical cable by assigning each to different wire pairs. 6ft USB charging cable, supporting charging (it is recommended to use a power socket for greater stability). This upgraded network 3-way adapter can transmit data up to 100 meters over a network LAN cable at speeds up to. An Ethernet splitter is a small device that allows two Ethernet-connected devices to share a single cable run. It simply divides signal pairs. This not only expands the number of available Ethernet connections for waiting devices but makes running the Ethernet cable much easier since you needn't have multiple cables. When you need to connect multiple wired devices like computers, printers, and IP phones, but only have one Ethernet wall port, using an Ethernet splitter or network switch can expand your connectivity without rewiring. short answer is to get a switch.