V.42(redirected from V42)
An ITU-T standard protocol for error correction between modems, which includes MNP up to level 4 and asynchronous to synchronous conversion.
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V.42An 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.
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