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%.
[Details? On-line spec?]Last updated: 2004-08-02
Nearby terms:
V.32ter ♦ V.34 ♦ V.35 ♦ V.42 ♦ V.42bis ♦ V.90 ♦ V.91 ♦ va ♦ vacuum tube ♦ vadding
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