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Punch Down Blocks (Telephony or Ethernet Cables)
I hope this is the right area of this.. Guys, I need to know... what does a Punchdown block do? I see these in wiring...
Resistive hybrid for soundcard to enable speakerphone skype calls
I think it should be possible to use a resistive hybrid to convert from 4-wire to 2-wire, and plug an ordinary...
Effects of Solar Magnetic Storms on Early Telegraphy and Telephony
Back in the early days of telegraph and telephone lines, electromagnetic storms emanating from the sun shut down...
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