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V.42

An ITU standard (1989) for analog modem error checking that uses LAP-M as the primary protocol and provides MNP Classes 2 through 4 as an alternative protocol for compatibility. See V.42bis.



V.42bis

An ITU standard (1989) for analog modem data compression. It uses the BTLZ technique to achieve up to a 4:1 ratio. V.42bis implies the V.42 error checking protocol.



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Before/After Your Search Term
BeforeAfter
V.27bisV.42bis
V.27terV.44
V.28V.54
V.29V.56
V.32V.90
V.32bisV.92
V.32terboV.Everything
V.33V.Fast Class
V.34V.FC
V.35V.PCM

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