On Wednesday, 24 August 2022 at 20:20:55 UTC+1, Owain Lastname wrote:
> If someone can x-post to uk.telecom which is blocked on Google Groups due to spamming, please?
> Practical Electronics should be publishing design for a mini telephone exchange for using old phones as intercoms in the next - October? - issue
This is now in WHSmith.
It's a two-line ringdown circuit, not a dial intercom. Although very nice, with selectable UK / AUS / other ring cadence, various options for transmission bridge etc, it's rather complicated for anyone just wantting to run a couple of phones, and there are no options for dialling or more than two phones.
Just so you all know.
Thanks, and yes I do know about google groups shortcomings, but I don't want to locally cache newsgroups here.
Owain