Graham i saw your posts and it is true that it was a one way phone line - incoming only and it worked with broadband. I know thhi because i could not make any outgoing calls but could access broadband.
BT can agree to incoming calls only on a line as my daughter had this service so that we could contact her in emergencies [cheaper line rental] BUT, if you cannot make outgoing calls, how can the pc connect with the web and its different pages with various screeches & so on? After all, you connect to the broadband ISP, they don't connect to your PC .....
This is my confusion exactly. I had (my tenent to be honest) the same set up as your daughter, incoming only and emergencies. Now i don't use the BT landline at all, i have a company mobile, all calls paid for so why should i pay 30 odd quid for a 2 way line i'm never going to use!!!
All free phone numbers are open obviously so dial up was not a proble for him - but as many people have said here, if you need an incoming/outgoing phone line for broadband, how the hell did he do this with incoming only - and if it's possible i'd rather do this.