Utilize Unused Telephone Lines to Make a Home Intercom System
If you can manage it, get two speakerphone-type phones. Leave them in "speakerphone" mode continuously and pound on the keypad to attract the attention of the other end.
Heh. Via Boing Boing.
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4 Posted 2012-01-07 10:28:35 by Intercom repair NYC
I liked your idea of utilize
unused lines in order to make a
home intercom system :-) Thank
you !
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