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From: mckenzie@bbn.com (Alex McKenzie)
Newsgroups: comp.protocols.iso
Subject: Re: Session requirements negotiation
Message-ID: <61636@bbn.BBN.COM>
Date: 18 Dec 90 14:52:49 GMT
References: <275AA57B@gui.consumers.com>
Sender: news@bbn.com
Reply-To: mckenzie@labs-n.bbn.com (Alex McKenzie)
Organization: Bolt Beranek and Newman Inc., Cambridge MA
Lines: 13

I'm not positive, but I would guess that this is a "backward
compatibility" feature introduced when the current Session service/
protocol were created out of a merger of "computer system" ideas and the
CCITT's "Telematic service" ideas (probably the specific CCITT
Recomendation was T.62 but my memory is hazy).  Some (dumb) devices
which followed the draft CCITT Recomendation were expected to generate a
"canned" response to an open request; "processing" of the response would
be done at the originating (intelligent) end.  If you think this is not
too sensible please don't flame me; I neither invented nor supported it.

Cheers,
Alex McKenzie