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TonyDuell · 4th Jun 2019, 3:52 pm

I don't think terminal 13 is earth, it should go to the ringing converter only.

Looks like terminal 7 (in the N diagram, 'BT' means 'Block, Terminal') is earth. But I have an idea that it assumes the A wire is earthed at the exchange too. So try a link between 6 and 7?

4th Jun 2019, 3:52 pm	#7
TonyDuell Dekatron Join Date: Jun 2015 Location: Biggin Hill, London, UK. Posts: 5,213	Re: GPO planset with external extensions I don't think terminal 13 is earth, it should go to the ringing converter only. Looks like terminal 7 (in the N diagram, 'BT' means 'Block, Terminal') is earth. But I have an idea that it assumes the A wire is earthed at the exchange too. So try a link between 6 and 7?