Path: utzoo!utgpu!water!watmath!clyde!bellcore!rutgers!ucsd!ucbvax!ucdavis!deneb.ucdavis.edu!cck
From: cck@deneb.ucdavis.edu (Earl H. Kinmonth)
Newsgroups: comp.dcom.modems
Subject: Re: need help with xenix Kermit to PC procomm
Message-ID: <2906@ucdavis.ucdavis.edu>
Date: 24 Aug 88 15:24:51 GMT
References: <20302@neabbs.UUCP> <11744@oberon.USC.EDU> <6729@bigtex.uucp> <2877@ucdavis.ucdavis.edu> <115@jetson.UPMA.MD.US>
Sender: uucp@ucdavis.ucdavis.edu
Reply-To: cck@deneb.ucdavis.edu.UUCP (Earl H. Kinmonth)
Organization: University of California, Davis
Lines: 53

In article <115@jetson.UPMA.MD.US> john@jetson.UPMA.MD.US (John Owens) writes:
>In article <2877@ucdavis.ucdavis.edu>, cck@deneb.ucdavis.edu (Earl H. Kinmonth) writes:
>Well, the key words here are "leased line".  This is not where
>Kermit's strengths lie; Kermit is excellent at transferring files in
>wierd environments (through cranky data switches, protocol converters,
>IBM mainframes that speak EBCDIC, satellite links, and combinations of
>the above).  That's why the protocol overhead is so high.

Unfortunately kermit can't hack my current connection at all.  I
have a 9600 baud leased line from my ATT 6310 running Xenix (or
MSDOS).  This goes to the UCD data switch (Develecon) which
connects to a variety of machines through Develnet software
(Northern Telecom?).  This system USED to work until the Develnet
software was introduced and the speed of the connection between
computing center machines was raised to 38400 baud.

Part of the problem may be that kermit on the remote machine sees
a baud rate of -1 (no provision of 38.4k).  Another problem may
be that Develnet makes everything mark parity (or at least the
high bit is always on for incoming data to my machine).

I have tried (for hours) various combinations of parity and baud
rates on both the remote and local kermits.  Nothing works.  File
transfers and remote commands time out.  Sometimes the local
kermit crashes with a "protocol error."

xmodem is broken under this arrangement as well.  two versions of
MSDOS kermit fail too.

Both MSDOS and Xenix Ckermit will work on 1200 baud dialups to
the same machines.  9600 baud connections to Berkeley through the
same data switch but NOT through the Develnet connection do work
although the overhead is VERY high.

Any ideas would be deeply appreciated.

Also, if kermit does 8-th bit quoting on a need basis it would
seem that for transfers over 7-bit paths, base-85 coding (25%
expansion) of binary files should result in faster transmission
since kermit will always see an ascii input.


E H. Kinmonth Hist. Dept.  Univ. of Ca., Davis Davis, Ca. 95616
916-752-1636/0776

Disclaimer: What do I know about programming?  I teach Japanese
			history!

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