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Article #137

Re: Need to find a way to change comm parameters in Telnet session

#137
From: Joe Rosenfeld
Date: Thu, 05 Nov 1992 00:21
80 lines
3815 bytes
Eric P. Scott (eps@futon.SFSU.EDU) wrote:
: In article <1992Oct30.185456.18118@news.csuohio.edu>
: 	cowboy@trans.csuohio.edu (Joe Rosenfeld) writes:
: >I work at a University Law Library, where we use the internet for many  
: >things.  One of our vendors, mead Data central, the creator of Lexis, has  
: >an unusual telecommunications system situation.  When we telnet to the  
: >site on ANY platform, without using emulation software not available for  
: >the NeXT, we get a screen full of garbage.  I have discovered that the  
: >reason for this garbage is that Lexis expects to see a 7-e-1  
: >communications setup and the telnet session is eight bits.
: 
: Then they're violating protocol and are 100% responsible for
: correcting the problem.
: 
: [RFC 1123]
: |         In NVT mode, a Telnet SHOULD NOT send characters with the
: |         high-order bit 1, and MUST NOT send it as a parity bit.
: 
: >The problem is whether this can be somehow patched or configured into my  
: >NeXT telnet session, so that it appears or IS running as a 7-e-1 setup  
: >over internet telnet.  Can this be done?  any advice is appreciated.
: 
: Telnet connections do not--and must not--operate 7-E.
: 
: If you are using a terminal that requires 7-E-1 (unusual these
: days, but for the sake of argument), everything to the left of
: the point I've labeled "demarcation" would have parity stripped
: on input and generated on output; everything to the right would
: be 7-N.
: 
: [view with fixed-pitch font]
: 
:        demarcation
:             |
:             v
: +---+ serial +------+
: |TTY|--------|telnet| IP network
: +---+  line  |client|============>
:              +------+
: 
: In the inverse case, where a so-called "milking machine" is used
: to make hard ports available via telnet service, the same rule
: applies: the terminal server is responsible for making any
: necessary conversions.  NeXT's telnet client doesn't provide a
: mechanism to to this because it's not supposed to!
: 
: The bottom line is: if the telnets at each end are operating with
: the default modes, you should never see high bits on.  If,
: however, you've negotiated BINARY transmission (you can determine
: this by using telnet's "toggle options" command), you should get
: an 8-bit-clean path--but that's still a NO PARITY configuration.
: 
: When you pay big bucks to a commercial service provider, you
: expect them to perform a competent job.  The situation you
: describe is inexcusable.
: 
: 					-=EPS=-
EPS:

You are absolutely correct, on all counts.  But the vendor IS finally
trying to fix the situation they caused, so I appreciate that!

I tried stripping the high bit off in stty, by using -pass8 and -pass8out
and raw, cooked, -raw, etc, but no matter what I did in stty, it was all
the same.  Wish, for my own knowledge and peace of mind, at least, that I
could figure out how to use stty to correct the situation requiring me to
strip the 8th bit out, like MicroPhone Pro for NeXT does.

Thanks and regards-
Joe

--

-----

-----------
Joe Rosenfeld			cowboy@trans.csuohio.edu
Automation Librarian           joer@inca.law.csuohio.edu
Cleveland State University
"We look for things ... to make us go!"
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From: cowboy@trans.csuohio.edu (Joe Rosenfeld)
Subject: Re: Need to find a way to change comm parameters in Telnet session
Message-ID: <1992Nov5.002104.3346@news.csuohio.edu>
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Date: Thu, 5 Nov 1992 00:21:04 GMT
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