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ITU-T G.228 Measurement of circuit noise in cable systems using a uniform-spectrum random noise loading
ITU-T G.230 Measurement methods for noise produced by modulating equipment and through-connection filters
ITU-T G.243 Protection of pilots and additional measuring frequencies at points where there is a through-connection
ITU-T G.322 General characteristics recommended for systems on symmetric pair cables
ITU-T G.325 General characteristics recommended for systems providing 12 telephone carrier circuits on a symmetric cable pair [(12 + 12) systems]
ITU-T G.332 12 MHz systems on standardized 2.6/9.5 mm coaxial cable pairs