My dad is trying to connect his computer at the conservative club where he works to the internet, but when he does it says it cannot find a line. Could this be because the club has a payphone on the line?
The easiest way to test if the payphone is the problem is to disconnect it from the line and try to connect the broadband. If it works, its a problem with the payphone, if not, it's something else.
If it is a problem with the payphone, make sure that there is a micro-filter connected between the line and the phone.