I remember you quoting from the Dad book on this subject before, its touching that you still have such faith in your Dad.
It may upset you to know but even Dads dont know everything.
He knows especially little about this subject whereas I do know....
I am talking about Switch exchanges, built and ready to use not a wall switch here you know... I do realise BT Wholesale is rather limited technology wise but your expression about the dirth of his knowledge is truly depressing and should be a concern his employers may wish to explore on his next 1-to-1.
ill tell him to quit his job tomorrow then because i met a person who owns a GP on a forum who knows more about his job than him