ITU-T Recommendation V.90 98年9月版本
A DIGITAL modEM AND ANALOGUE modEM PAIR FOR USE ON THE PUBLIC SWITCHED TELEPHONE NETWORK (PSTN) AT DATA SIGNALLING RATES OF UP TO 56 000 bit/s DOWNSTREAM AND UP TO 33 600 bit/s UPSTREAM
标签：
modEM
Recommendation
ANALOGUE
DIGITAL
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2014-01-17
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