30 Dec '12, 11am

fyi, POTS (plain old telephone service) still exists. But til when? :) From @element14:

fyi, POTS (plain old telephone service) still exists. But til when? :) From @element14:

Last week Spectrum Magazine interviewed Daniel Beringer about an initiative to end traditional landline telephones by June 2018 . To those of us for whom the public switched telephone network (PSTN), which often goes by the nickname plain old telephone service (POTS), was once the primary means of communication, this feels like a radical change. One advantage to an all-VoIP system is audio quality could be improved. A POTS line runs at a constant data rate of 8k samples/sec * 8 bits/sample. POTS encoding schemes, mu-law in the US and A-law in Europe, have smaller increments at lower signal levels to reduce quantization noise. This is an improvement over a linear ADC, but it's nothing compared to modern audio compression. The audio must be band-limited to prevent aliasing. A POTS line only passes 300-3300Hz. The Audible Spectrum and Human Speech Human hearing covers 20Hz to...

Full article: http://www.element14.com/community/community/news/blog/20...

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