Actiontec MI424WR + ECB2500 Coax Network

I have internet coming via Ethernet cable to my apartment from my internet service provider (ISP). Their fiber-optic ONT box is on the top floor of the building, so they bring Ethernet cable with internet signal to my flat. Inside my apartment I have existing Coax wiring. Since I don't want new Ethernet wiring inside the apartment, I am trying to use existing Coax wiring for that purpose.

I purchased 2 Actiontec ECB2500 Coax to Ethernet adapters and they work fine when connected via a Coax...

Actiontec MI424WR + ECB2500 Coax Network