Dodgy cooling in the cabinet, and they haven't noticed? Sounds like it!

Nah. Continuous Dial Tone faults are always gonna be odds on internal wiring. Likely short terminal 2 and 5.

Unless of course the intermittent short is in the cabinet.

Edit: "... always gonna be odds on ...". So, not always?

Edited by RobertoS (Wed 28-Oct-15 21:14:16)

If you can come up with a way that Continuous Dial Tone is in a cabinet or joint I'd be happy to learn.

In my experience a low insulation loop fault at the cabinet or local loop will be causing ring trip and the mother of all noise on the line way before causing Continuous Dial Tone.

However, the fact is that the rectified loop has gone away of it's own accord, some time after the engineer was in the pavement box re-doing the connections and fitting a casing to cover them - nothing else was done in my house or outside. I can't say about the cab because there's always someone in there anyway.

In reply to a post by partial:

Nah. Continuous Dial Tone faults are always gonna be odds on internal wiring. Likely short terminal 2 and 5.

Simple to diagnose as an internal wiring fault, three or four visiting engineers still didn't discover that?