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Old 28th Sep 2017, 7:45 pm   #2
TonyDuell
Dekatron
 
Join Date: Jun 2015
Location: Biggin Hill, London, UK.
Posts: 5,191
Default Re: "Genie" telephone

I assume the 2 contacts on the gravity switch are for line switching and anti-tinkle.

The latter will short-circuit the internal bell/ringer which explains why it stops ringing when you lift the handset. But it will not complete a DC loop across the line, so that's why it doesn't cause the exchange to remove the ringing voltage, etc.

First thing to check is the line cord. If the pin 2 wire (red) is open-circuit then the phone will behave like that as you only need pin 3 (blue) and pin 5 (white) for the ringer and anti-tinkle switch.

If that's good, then you will have to trace through all the wiring in the telephone to see just how the DC loop is completed and why it isn't working in this case.
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