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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Phone Circuit
On Friday, January 23, 2015 at 11:29:14 PM UTC-5, Jonny Quest wrote in sci.electronics.repair:
Phone Circuit. a 3-way switch turns phone service on/off from 2 locations an LED indicates when the phone is on/off at the 2 locations a switch toggles phone service between the land line (local) and internet phone (long distance) N.C. contacts permit use of the phone when power outages disable the relay coil. http://www.stonetabernacle.com/PHONE_CIRCUIT.html Right, but why pay for it? Because that's before Apple and PC computers started going wireless and/or high speed internet. Now you can do all that from a desktop, tablet or your wireless phone service (like with "Skype" and "MajicJack" and through most chat rooms. |
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