Quote:
Originally Posted by Oldcodger
Most possibly, Dave, but in my days of hawking out old BT earth calling systems ,I stuck a tele on the line and if no DT, just tried an earth on one leg. Then it was call BT and ask for the line(s) to be made loop dis.
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My working in telecoms was as a third-party maintainer in the early '90s, not long after deregulation. I came across a fair few earth-start lines, on PABX's that could equally have been configured as loop or earth start.
Our training, such as it was, did not include such eccentricities, and I think some of my colleagues might have condemned the lines as being dead.
As for myself, I probably drew on my childhood experiments with our party-line at home and guessed what was going on, particularly the distinctive "Bzzz" I heard in my test butt when the line was seized.
I wonder how long earth start lines were supported? I remember when meter pulses stopped being supplied.