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
ITU-T Recommendation T.30(2005 09)
SERIES T: TERMINALS FOR TELEMATIC SERVICES
Procedures for document facsimile transmission in the general switched telephone network
