I have a hairbrained idea that requires ring generation when all extensions on a classical analog telephone line are hung up. Aim is to use the extensions as an intercom within a big house. Once two extensions are "off the hook" they communicate OK. Rather then stupidly duplicate ring equipment, maybe I could just 'synthesize' or fake the ring signal??
You don't need any such complicated (and unworkable, for a variety of reasons) ideas. There are plenty of dial intercom modules, made by Melco, TelTone, and Valcom (just to name a few) that will do an admirable job of forming the core of your intercom system.
Poke around on Ebay for things like this:
formatting link
formatting link
Other stuff shows up frequently. Keep in mind that you will also need an appropriate key telephone system power supply, with a ringing generator if you want to use actual ringers, such as this one:
formatting link
...or this one (a bit cheaper):
formatting link
Outside of that, all you need are a few phones of just about any kind you want, some wiring, and some effort.
Happy hunting.
--
Dr. Anton Squeegee, Director, Dutch Surrealist Plumbing Institute
(Known to some as Bruce Lane, KC7GR)
I used to repair those! I bought dead ones for $2 each, fixed about half of them, then sold them to people still using 1A2 type phone systems. I think I finally used up the last of them, but I may still have a box full of relays and the custom hybrid filters.
--
We now return you to our normally scheduled programming.
Michael A. Terrell
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.