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Telephone-controlled switch

Telephone-controlled switch
The switching unit described here is capable of controlling up to seven mains-powered loads with the aid of commands received via telephone. Any tone-dialling (DTMF) telephone set or hand-held tone dialler may be used to send commands to the switching unit, and remotely control a wide range of mains appliances in and around the horne. With personal access code and system feedback!
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