文件名称:Physical-Layer-Serial-Interface-Standards
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Overview Physical Layer Interface Standards (PSTN)
EIA RS-232-C/D, V.24, V.28, RS-423-A, RS-422-A, RS-449, EIA-530, V.35, USB, Hierarchy ITU - T V series.
EIA RS-232-C/D, V.24, V.28, RS-423-A, RS-422-A, RS-449, EIA-530, V.35, USB, Hierarchy ITU - T V series.
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Physical Layer Serial Interface Standards.pdf