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V.26bis

V.26bis is comparable to V.26 as a transmission standard. The difference is that V.26 operates via four-wire leased lines, whereas V.26bis transmits via two-wire lines and the public telephone network. V.26bis modems operate at 2,400 bit/s and are equipped with a fallback

to 1,200 bit/s. The transmission method used by V.26bis is phase difference modulation (PDM). V.26bisuses phase difference modulation (PDM) as the transmission method

. Since V.26bis is relatively slow, it is hardly used any more.

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Englisch: V.26bis
Updated at: 26.09.2008
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Translations: DE