Phone companies ditching copper wires will have to follow the rules
The Federal Communications Commission is trying to ease the transition from old copper phone lines to modern alternatives like wireless and fiber. While those new services sound like they should be high-tech improvements, they do come with some limitations: most notably, they don’t provide their own power like copper does, meaning that you can’t make a phone call over them when the power is out.
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Story added 7. August 2015, content source with full text you can find at link above.