There is a cable from the old provider, what benefit can you get from it (Light there for example)?

Question

Do it yourself

Good day!
There was a cable from the old provider, which I no longer use, it turned out to be still working.
Question: what benefit can be derived from this?
For example, to get free electricity - albeit a bit, but is it possible to illuminate the workplace, or even the whole room with LEDs? Maybe there are people who have done this?

Answer 1

plug it into the socket. let the provider shine.
wow, what questions... (facepalm)

Answer 2

Terminate the contract with him (the provider) for the provision of services and let him be dismantled from your apartment.

Answer 3

cut off and hand over to copper, power a diode from it at best, as it will work in the keyboard. Well, or use it for its intended purpose, just crimp the other end.

Answer 4

Well, in general, you can lead to 2 routers in another part of the apartment!