StarTech.com 2-to-1 RJ45 Splitter Cable Adapter - Network splitter - RJ-45 (M) - RJ-45 (F) - Connect two 10/100 Ethernet devices to a single Cat5/Cat5e cable drop - Reliable Paper
Amazon.com: RJ45 Network Switch Selector 2x1/1x2, 2 Port Network Hub 10/1000M Metal Housing : Electronics
I'm having trouble getting RJ45 connectors onto this larger gauge Ethernet. Any advice? : r/HomeNetworking
StarTech.com 10/100 VDSL2 Ethernet Extender Kit over Single Pair Wire ? 1km - Extend your 10/100Mbps network by up to 1km over Ethernet or RJ11 phone lines - ethernet extender - lan