3 ms·
Original landline audio was/is analog
by YarickR2 6y ago
Original landline audio was/is analog
- deleted 6y ago[deleted]
- colanderman 6y agoNot an authoritative source, but (as a point of interest) analog landlines seem to be specified as 24 dB SNR and 300-3000 Hz passband [1], giving ~21.5 kbps information rate [2]. [1] https://www.tschmidt.com/writings/POTS_Modem_Impairments.htm https://www.tschmidt.com/writings/POTS_Modem_Impairments.htm [2] https://en.wikipedia.org/wiki/Shannon%E2%80%93Hartley_theorem https://en.wikipedia.org/wiki/Shannon%E2%80%93Hartley_theore...