Im in the process of replacing a far flung phone jack with a network cable.  To reuse the hole I cut the phone wire heading to the room to run the cat6 cable.

Obviously the phone cable was connect back into the house somewhere (would be part of a split upon split upon split type config, no distribution panel here).

What should I do with that cable to terminate in properly....as annedotally I notice my internet speed is down by 1mbps today.  I'm not sure if I can trace it back to it's split, so may have to just be able to end it nicely and leave it under the house.  I only really need a short term solutio as I should be hooked to fibre this week.

But I am intending to connect my pap2t to the phone wiring so that I can just plug in regular phones to the multitude of jacks I have in this house.