Considering MoCA ethernet to coax will do >1Gbps over 1km distances for the same price, I'm failing to see the use case unless you absolutely have to reuse an existing wire pair. Ultra lower power applications maybe?

https://www.newegg.com/p/1B4-03D1-00051?item=9SIAU2EH777285

https://www.amazon.com/MOTOROLA-Adapter-Ethernet-Bonded-MM10...

https://www.newegg.com/p/1FR-00BD-00001?item=9SIA1CZEDM0099