2 x Ethernet RJ45 3 Way Network Cable Splitter for Computer

RJ45 Splitter Adapter Cable, Ethernet Cat5/Cat5e, 6 in

RJ45 Ethernet Splitter Cable, TSV 1 to 2 LAN Male to Female Network Adapter Fit for Cat5, Cat5e, Cat6, Cat7 Ethernet Socket Connector

3 Pack RJ45 Splitter Adapter 1 to 2 Ways Dual Female Port CAT5/6/7 LAN Ethernet Cable

You run an Ethernet cord from the wall to the splitter cable, one from the splitter to a computer (or laptop, and one from the splitter to another

RJ45 Splitter Adapter LAN Ethernet Cable 1-4 Way Dual Female Port Connector Plug

Connect two 10/100 Ethernet devices to a single Cat5/Cat5e cable drop. The RJ45SPLITTER 2-to-1 RJ45 Splitter Cable Adapter increases the number of RJ45 network connections on an RJ45 outlet, allowing two 10/100 Ethernet signals through a single Cat5/Cat5e wire.

StarTech.com 2-to-1 RJ45 Splitter Cable Adapter

QVS CAT 5e Splitter 6 in. – Beige - Micro Center

Splitter 3-in-1 Network Cable Connector Three-way RJ45 LAN Ethernet Adapter for Computer 1 Male to 2/3 Female Extender Cable - AliExpress

This is for driving two POE devices off one cable. If you have an extremely long run for one camera and you needed to add another, this would be a great solution. Plugged into two POE+ ports at the switch which uses one CAT6 cable and at the far end it splits to two POE ports that you have a splitter for Ethernet and 12-Volt to run a powered mic and camera and the other is just running another POE camera.

SPT RJ45 Ethernet Cable Combiner Splitter Kit (2-Pair)

RJ45 Cat 5 UTP Splitter - 150mm