# Use 2 of the 8 cables of an existing ethernet connection

There is an Ethernet cable that runs from a server room to an office. That cable is connected to a router. There are times when we need to reset that router and I will like to do that remotely. There is only one Ethernet cable that runs to the office I wish there was one more.

I will like to place an arduino or raspberry pi at the office that will be responsible for turning off and on the router with a relay.

I need to send a signal from the server room to the arduino located at the office.

I have tried using the NRFL01 and other radio signals but the distance is to far and the signal is lost because there is a lot of walls in between.

I want to use 2 of the existing Ethernet cables just like a Poe switch uses some off the wires to inject power. Instead of injecting power I will like to insert a signal. What cables can I use of the internet cable. I know very little about networking. Does it matter if it's a cat5/cat6? Can I do something like that?

• You say there is only one ethernet cable running to the office, but later say you would like to use two of the existing ones. Are you perhaps confusing wires and cables? – JYelton May 26 '20 at 22:55