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From: paul@frcs.UUCP (Paul Nash)
Newsgroups: comp.dcom.modems,comp.unix.xenix,comp.unix.i386
Subject: Re: Error-correcting modems & uucp
Message-ID: <967@frcs.UUCP>
Date: 10 Apr 90 17:45:13 GMT
References: <963@frcs.UUCP>
Organization: free range computer systems cc
Lines: 33

In article <963@frcs.UUCP>, paul@frcs.UUCP (Paul Nash) (ME) writes:
> I have a pair of v22bis MNP4-compatible modems ...
> ... advantages or disadvantages to using MNP on top of (under?) uucp.
> Should I lock the interface at 9600 and use RTS/CTS flow control ...

I have conducted a few (_very_ few) tests, with no line-condition
checking, so don't take these results as accurate, but:

file xfer (uucp-g) 7168 bytes (average of about 5 each type & each way):
	
	dte interface 2400 bps, no mnp (v22bis):	214 cps
	dte interface 2400 bps, MNP4 (v22bis):		214 cps
	dte interface 9600 bps, MNP4 (v22bis):		148 cps
	
From this I _assume_ that MNP4 doesn't hurt (the modems don't do 
MNP5++). It also seems that a fast dte speed on a slow (and cheap)
modem (Octocomm osi8224a) can only hurt! This is slightly at odds
with some of the network users' experience, so maybe I'm doing
something wrong (like using Xenix?).

> Any experiences greatfully received. Either post to the net if you
> think that there is sufficient interest (I think that it is, which is
> why I am posting :-), or e-mail me and I will summarise.

To those who have responded so far (both net & mail), many thanks. I
_will_ summarise, but also want to do some tests to include with the
summary, and I am being delayed 'cos the T2500 is still clearing
customs (they promised it out yesterday, so ...). However, I _will_
summarise (promise!).
-- 
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 ...!uunet!ddsw1!proxima!frcs!paul                paul@frcs.UUCP
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