home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
kermit.columbia.edu
/
kermit.columbia.edu.tar
/
kermit.columbia.edu
/
newsgroups
/
misc.19941031-19941221
/
000251_news@columbia.edu_Wed Nov 23 16:46:59 1994.msg
< prev
next >
Wrap
Internet Message Format
|
1995-07-31
|
2KB
Received: from apakabar.cc.columbia.edu by watsun.cc.columbia.edu with SMTP id AA02074
(5.65c+CU/IDA-1.4.4/HLK for <kermit.misc@watsun.cc.columbia.edu>); Wed, 23 Nov 1994 11:47:15 -0500
Received: by apakabar.cc.columbia.edu id AA21927
(5.65c+CU/IDA-1.4.4/HLK for kermit.misc@watsun); Wed, 23 Nov 1994 11:47:14 -0500
Path: news.columbia.edu!watsun.cc.columbia.edu!fdc
From: fdc@watsun.cc.columbia.edu (Frank da Cruz)
Newsgroups: comp.protocols.kermit.misc
Subject: Re: Alternate character set
Date: 23 Nov 1994 16:46:59 GMT
Organization: Columbia University
Lines: 33
Message-Id: <3avrm3$lck@apakabar.cc.columbia.edu>
References: <1994Nov21.180341.10495@ivax> <1994Nov22.222550.33619@cc.usu.edu>
Nntp-Posting-Host: watsun.cc.columbia.edu
Apparently-To: kermit.misc@watsun.cc.columbia.edu
In article <1994Nov22.222550.33619@cc.usu.edu>,
Joe Doupnik <jrd@cc.usu.edu> wrote:
>In article <1994Nov21.180341.10495@ivax>,
>rjfortho@indyunix.iupui.edu () writes:
>> I am using MS-Kermit to dial in to an IBM 3090 mainframe, through a protocol
>> converter. Periodically, I will get line noise which causes Kermit to
>> switch character sets on me.
>Those would be control codes SI and SO which change character
>sets on you. A real VT100 will do exactly the same. Use VT320 where
>these two codes switch amongst the same character sets most of the time...
>
It is a fundamental limitation of terminal/host communication that noise
can be generated on the communication channel that looks to the terminal
exactly like a legitimate control function. Control functions can do
anything at all -- not just switch character sets. You can avoid this
situation by setting up an error-corrected terminal session via SLIP, or
making a network connection instead of a serial connection, etc. You can
minimize (but no eliminate) the risks of this on a dialup connection by
using an error-correcting modem and hardware flow control.
When you can't avoid a noisy connection, and you only care about ASCII
characters (i.e. you don't ever want to see accented letters, etc), then
you can designate ASCII to all four of Kermit's terminal character-set
tables as follows:
SET TERMINAL CHARACTER-SET ASCII G0 G1 G2 G3
Consult "Using MS-DOS Kermit", Appendix II, "Terminal Character Set
Terminology and Mechanics", pp.289-290, for details. For further details,
read ISO standards 4873 and 2022, or a VT220 or VT320 Programmer Reference
Manual.
- Frank