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T.30 also references the various modem standards. V.21, V.27ter, V.29, V.17, V.34: ITU modem standards used in facsimile. The first three were ratified prior to 1980, and were specified in the original T.4 and T.30 standards. V.34 was published for fax in 1994. [59] T.37 The ITU standard for sending a fax-image file via e-mail to the intended ...
This use of G.711 coding is sometimes called 'fax pass-through' as it enables analog fax transmission (which also uses a modem connection) over VoIP. [2] G.711 modem-over-VoIP communication can be useful for connecting an Internet-connected computer to a dial-up system that only has modem connectivity over the PSTN.
V.17 is an ITU-T recommendation for a fax modem using TCM modulation at 12 and 14.4 kbit/s. V.18 is an ITU-T recommendation for operation and interworking of text telephone devices V.21 is an ITU-T recommendation for full-duplex communication between two analogue dial-up modems using audio frequency-shift keying modulation at 300 baud to carry ...
Alternatively the term fax server is sometimes used to describe a program that enables a computer to send and receive fax messages, [1] set of software running on a server computer which is equipped with one or more fax-capable modems (or dedicated fax boards) attached to telephone lines or, more recently, software modem emulators which use T ...
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