V.42bis

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V.42bis

An ITU standard (1989) for 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.

(communications, standard)

V.42bis - An extension of the ITU-T V.42 standard modem protocol to included compression using a Lempel-Ziv related technique, which detects frequently occurring character strings and replaces them with tokens. This is similar to the Unix compress utility. Typical compression for text is 50% or better; with nearly 20% gain from synchronous conversion this gives reduces transmission time by almost 60%.

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No references found			44 data compression capability, which typically improves data compression by some 20% to 60% over the V. MAJOR COMMUNICATIONS SOFTWARE HOUSE SHIPS SOFTWARE; ENABLES FASTER ... by EDP Weekly's IT Monitor 44 technique typically improves data compression between 20 and 60 percent beyond the existing V. Intel Releases Software Upgrade For V.92 Modem Standard by Business Wire Higher throughput can be achieved (200 kbps to 300 kbps) by ITU-T V. Mapletree Networks Announces PHS Wireless Support For UniPorte ... by Business Wire			V.21 V.22 V.22bis V.23 V.24 V.25 V.25 bis V.25bis V.26 V.26bis V.26ter V.27 V.27 ter V.27bis V.27ter V.28 V.29 V.32 V.32bis V.32ter V.32terbo V.33 V.34 V.35 V.42 V.42bis V.44 V.54 V.56 V.90 V.91 V.92 V.Everything V.FAST V.FC V.PCM V/FX V/STOL aircraft V1S V20 V30 V471 Tauri star VA Va-Nu-Pieds Vaagn Armenakovich Davtian Vaagn Davtian Vaal Vaal River Vaan Fomich Totomiants Vaan Oganesovich Totovents Vaan Terian			V.22 V.22bis V.23 V.24 V.24 V.25 V.25 bis V.25bis V.26 V.26bis V.26ter V.27 V.27 ter V.27bis V.27ter V.28 V.29 V.32 V.32 V.32bis V.32ter V.32terbo V.33 V.34 V.34 V.35 V.35 V.42 V.42 V.42bis V.44 V.54 V.56 V.90 V.90 V.91 V.92 v.a. V.cholerae v.d. v.d. v.d. V.everything V.fast V.Fast Class V.Fast Class V.FC V.FC V.G. Childe V.G. Panneerdas & Co v.i. v.i. v.i. v.i. V.I. Lenin V.I. Ulyanov V.I.P. syndrome V.LE V.M. Illich-Svitych V.P.

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