MNP levels

[Mark Fawcett]

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 at cristal.oz)

PHONE:	+61-2-888-3685		UUCP:		uunet!cristal.oz!mark
FAX:	+61-2-888-2328		INTERNET:	mark at cristal.oz.au