Trouble is the line test will only pick up gross faults like either wire short to earth or open circuit. It can't reliably tell if a short between the wires is really a fault or just how that line is at the time of the test. Intermittent faults or noise just pass it by.
You don't need to spend money on a phone, borrow one from a neighbour...
Cost of NFF from BT - £128 Cost of cheap phone to test £5.
I know which I'd do.
Testing my phone line. £0, cost of phone £15.
Saving to me £15.
Or in my case, nil. A BT engineer left his test handset(*) behind, many years ago, and very useful it is, too.
(* I was going to call it by its proper name, but knowing you lot...)
A linesman's test telephone.
It's our American cousins call them things to do with botties.
Owain
Do it mainstream UK office hours, 9-5, 5 days a week, not bank holidays.
That way you get a UK (Scottish?) call centre with a clue, not their abysmal Indian outfit.
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