Path: utzoo!mnetor!tmsoft!torsqnt!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!cs.utexas.edu!sun-barr!apple!netcom!gandrews
From: gandrews@netcom.COM (Greg Andrews)
Newsgroups: comp.unix.sysv386
Subject: Re: SYSV R4.0 High speed UUCP
Summary: V.42bis incompatibility between PPI and Telebit?
Keywords: UUCP V.32 V.42bis PEP
Message-ID: <24499@netcom.COM>
Date: 18 Feb 91 06:57:10 GMT
Expires: 18 Feb 91 06:57:09 GMT
References: <1991Feb15.054602.913@jadpc.cts.com> <24318@netcom.COM> <1991Feb17.195353.25156@rwwa.COM>
Followup-To: comp.unix.sysv386
Organization: Netcom - Online Communication Services  UNIX System {408 241-9760 guest}
Lines: 37

In article <1991Feb17.195353.25156@rwwa.COM> witr@rwwa.COM 
(Robert W. Withrow) writes:
>
>Yes, and there is the rub.  My interpretation is that each modem
>manufacturer has implemented V.42/V.42bis slightly differently (this
>was the gist of a Byte review of these modems) leading to
>incompatabilities.  I know for a fact that I cannot do 9600 BPS UUCP
>using a Practical Periphials modem to a Telebit T2500 when using
>V.42(bis) LAP-M/compression.  If I turn off the V.42/bis stuff the
>transfer works OK.
>
>The annoying thing is that you get into a p***ing match where both
>modem manufacturers swear that their modem is correct and the other guy
>is in the wrong.  In my case there are 6 parties involved.
> [list deleted]
>
>And [Telebit and PPI] have been precious little help in getting the
>problem solved!
>

It's certainly possible for two sets of engineers to interpret the
recommendation differently.  It's also possible for one group of
programmers (or both) to make mistakes in their code.

I would expect a problem that really is an incompatibility between
the modems would be easy to demonstrate to tech support.  I can't
think of any data sets that would work fine with Xmodem or Ymodem
but would fail with uucp.  Even so, Telebit tech support has a
Unix system available for uucp testing.  I would suggest that you
call and try some test transfers.  Kermit and X/Ymodem transfers
can be done by any of the support techs.  Uucp can be arranged in
about ten minutes. 

-- 
.-------------------------------------------.
| Greg Andrews      |   gandrews@netcom.COM |
`-------------------------------------------'