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Old 23rd Sep 2022, 8:34 pm   #10
Roger Ramjet
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Join Date: Feb 2022
Location: Leicestershire, UK.
Posts: 690
Default Re: Practical Electronics mag - Telephone exchange project

Quote:
Originally Posted by OscarFoxtrot View Post
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.
Ta for the info Oscar.... might be useful as a telephone tester ? Will try to ge a copy.

rog
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