As expected…

as I expected, BT rang me up mid-morning, failed to find me in my office
and left a voisemail. “We have done a test on your line from the exchange
and can find no faults. If you have any other problems please call us on
0800 679 849.”

Well, it’s obvious that the approx 50Hz hum with overtones which go in and
out of phase it merely a figment of my and my modem’s imagination. If BT’s
wonderful diagnostic kit in their exchanges can’t find anything wrong then
obviously it must be an illusion, right?

I’ve been trying to phone the number they gave in the call to try to get
them to send out an engineer to my house so he can hear the dillusional noise
on the line as well. The problem is that the number is constantly engaged.
Maybe BT’s call centre has a fault on the line.