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V25bis

See V.25bis.



V.25bis

An ITU standard (1968) for automatic calling and/or answering equipment on dial-up lines. It has three modes: asynchronous (rarely used), character-oriented synchronous (bisync) and bit-oriented synchronous (HDLC/SDLC). Both synchronous versions were used in IBM AS/400 and other small-to-medium sized computers that did automatic dialing for remote job entry.

Due to the popularity of the Hayes AT Command Set, V.25bis is not used as widely in North America. It does not perform modem configuration functions and is limited to dialing and answering calls. See AT command set.



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V120V26bis
V17V26ter
V20V27
V21V27bis
V22V27ter
V22bisV28
V23V29
V24V2I
V25V2V

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