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Old 18th Sep 2017, 9:32 pm   #30
JHGibson
Retired Dormant Member
 
Join Date: Apr 2003
Location: Salt Spring Island, BC, Canada
Posts: 368
Default Re: Interconnecting old telephones?

I saw an interesting article on using two old dial phones as an intercom, together with sonalerts as signaling devices at

makezine.com/2006/02/28/how-to-use-old-telephones/

The intercoms are connected with a pair of wires.
John.
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