The S/CNN for both trunk and nonloaded subscriber loop circuits shall not be less than 31 dB. 4kHz/2*log2(1+10^(31dB/10)) ~ 60.3kBps [0] https://www.ecfr.gov/

The S/CNN for both trunk and nonloaded subscriber loop circuits shall not be less than 31 dB. 4kHz/2*log2(1+10^(31dB/10)) ~ 60.3kBps [0] https://www.ecfr.gov/current/title-7/subtitle-B/chapter-XVII/part-1755/section-1755.405 https://www.ecfr.gov/current/title-7/subtitle-B/chapter-XVII...