I have just stumbled onto this thread and maybe someone can answer this?
I had a slow internet speed ((300 - 500) when tested at my PC. The telephone engineer tested the speed at the point where the line came into the house and said it was 5mb.
His suggestion that the old phone wiring in the house (something he was not allowed to touch) may be to blame was correct, I replaced it and I am now getting good readings.
Question: I was out when the engineer called and was wondering what piece of equipment he would have used to do the test, and is it expensive to buy?