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- Path: sparky!uunet!cis.ohio-state.edu!magnus.acs.ohio-state.edu!usenet.ins.cwru.edu!po.CWRU.Edu!hac
- From: hac@po.CWRU.Edu (H. Anthony Chung)
- Newsgroups: comp.sys.amiga.datacomm
- Subject: Re: protocols, speeds, what are V42bis, etc..
- Date: 3 Sep 1992 02:56:27 GMT
- Organization: Case Western Reserve University, Cleveland, OH (USA)
- Lines: 32
- Message-ID: <183ussINNbn9@usenet.INS.CWRU.Edu>
- References: <2507@ulysse.enst.fr>
- Reply-To: hac@po.CWRU.Edu (H. Anthony Chung)
- NNTP-Posting-Host: thor.ins.cwru.edu
-
-
- In a previous article, jeannet@stheno.enst.fr (Olivier Jeannet) says:
-
- >I would like to be absolutely sure about the standards named Vxx[bis].
- >Can someone explain me what are
- >
- >V32, V32bis, V42, V42bis, MNP4, MNP5.
- >Does a "bis" indicate the use of MNPx protocol ? How do these standards
- >interact ?
-
- V32 is 9600 raw BPS. v32bis is 14.4 kBPS raw throughput.
- V42 is error detection and correction. V42bis is 4:1 data compression,
- so you can theoretically get 57.6 KBPS if you have v32bis and v42bis.
- MNP4 is error detection and correction. MNP5 is data compression.
- Generally I think that the V protocols are better to have than the
- MNP ones.
-
- >This must be a FAQ, but I'm getting confused reading some ads talking about
- >2400 bps AND V42bis (which, I thought, was 14400 bps). Thanx for precise
- >answers.
-
- 2400 bps and v42bis will theoretically give you 9600 bps (4*2400).
- But that is only for stuff that is easily compressed like text.
- Otherwise, your rates will be x where 2400 <= x <= 9600.
- >
- >Olivier.
- >
- --
- ___ ____ +----------H. Anthony Chung---------+-------+
- /\_/\ / _ \\ / C A B A L /\| Case Western Reserve University |ILUVUIS|
- \ \\ \\ \\ \\ \______________/ /| School of Dentistry |ISILUVU|
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