Tripp Lite N035-001 2-to-1 RJ45 Splitter Adapter Cable, 10/100 Ethernet Cat5/Cat5e (M/2xF), 6 in.

Transmits 2 Ethernet Signals Through a Single Network Cable
This RJ45 splitter/adapter (M/2xF) lets you transmit two 10/100 Mbps Ethernet signals through one Cat5/Cat5e network cable, saving you the time, effort and cost of adding a second cable drop. Note
: Two N035-001 adapters are required: one connected to two network devices, such as servers or computers, and one connected to two ports of a network switch.

Simple Plug-and-Play Installation
One Cat5/Cat5e cable connects both N035-001 adapters through a four-pair UTP wall plate or patch panel. The RJ45 jacks transmit on 1, 2, 3 and 6. Built-in flanges allow mounting on a wall or other flat surface. Note
: The N035-001 cannot be used to share two computers on one network line.