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Old 26th Aug 2022, 1:17 pm   #6
Roger Ramjet
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Join Date: Feb 2022
Location: Leicestershire, UK.
Posts: 690
Default Re: Practical Electronics mag - Telephone exchange project

Thanks - that's interesting & worth a look.... Practical Wireless did an article many many moons ago that allowed connection of two telephones using relay logic to switch the ringing current. I wonder if the PE article uses electronic switching with multiple extensions ?
Rog
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