Can somebody please explain the following to me?
My in-laws have just bought a new house and their old house is still up for sale. They are with Plusnet for phone and broadband and the phone line at the old house was 'disconnected' a week or so ago. The phones in their new house became live with a new number on the same day.
However, their old house remained connected to the internet via ADSL even though the phones were inactive.
They moved all their equipment to the new house yesterday and expected ADSL to be inactive but it all worked straight away.
Now, either something odd is going on here or (more likely) I've been misunderstanding how ADSL works.
I was under the impression that it was pretty much 'tied' to a line. I thought the connection in their old house would go dead when the phone line was cut off. The fact that it stayed live surprised me.
I therefore assumed that they'd have problems when they moved everything to their new place - but, no.
So, what would happen if they took their router to a completely different address? Would it just connect? Does it simply rely on an address being ADSL-ready, utilising the ISP username and password?
I could have sworn that when I moved out of my parents' house, the ADSL had to be specifically connected to this line (even though the previous owner had ADSL). I assumed it was then disabled at my parents'.
Any clarification would be gratefully received so that I can at least understand how it works.