In the UK, pull the socket front off and look what the wires actually are.
I have seen electricians use cat 5 to carry phone lines several times. It is a mixture between having cat5 already in stock, and future proofing I think.
If it is cat 5 then just put an RJ45 socket on it.
As others have said, you can also try running ethernet on a phone line, you might not get gigabit, but you might get more than what is coming into your house!
The third point is you may be able to use the phone cable to fish a cat 5 through (depending on where it is). Electricians tend to be very good at this!
I have seen electricians use cat 5 to carry phone lines several times. It is a mixture between having cat5 already in stock, and future proofing I think.
If it is cat 5 then just put an RJ45 socket on it.
As others have said, you can also try running ethernet on a phone line, you might not get gigabit, but you might get more than what is coming into your house!
The third point is you may be able to use the phone cable to fish a cat 5 through (depending on where it is). Electricians tend to be very good at this!