Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!munnari.oz.au!metro!sunaus.oz!softway!cristal!mark From: mark@cristal.umpx.oz.au (Mark Fawcett) Newsgroups: comp.unix.xenix Subject: Re: MNP levels Summary: MNP Levels 1 to 4 are in public domain, not just 1 and 2. Message-ID: <180@cristal.umpx.oz.au> Date: 31 Jul 90 16:14:23 GMT References: Organization: Microplex Pty Ltd Lines: 33 For all the folks who are interested in running MNP in software on your Xenix machine, here is some more detailed information. Microcom have released levels 1 to 4 into public domain, and this was required prior to the CCITT approving it under the V42 standard for error correcting protocols in modems. MNP Level 5 compression is proprietry to Microcom but V42bis compression is covered by CCITT standard V42bis. It is not a difficult job to implement MNP is software on a Xenix machine in C. Microcom have released source code for a rudimentary version which is written in Microsoft C for ms-dos. I would suggest that MNP is usefull for running interactive terminal sessions, but gets in the way of most protocols such as uucp etc which will move news for you much faster. Mnp with V42bis compression is particularly usefull for interactive terminal sessions whilst running vi to edit C programs as the compression achieved with a decent implementation will typically be at least 100%. If you would like any more detailed information send requests directly to me and i will summarise to the net, if any level of interest is shown. .signature -- Mark Fawcett - Microplex Pty Ltd (mark@cristal.oz) PHONE: +61-2-888-3685 UUCP: uunet!cristal.oz!mark FAX: +61-2-888-2328 INTERNET: mark@cristal.oz.au