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From: robert@pvab.UUCP (Robert Claeson)
Newsgroups: comp.unix.questions
Subject: The DSR pin - what is it used for?
Message-ID: <304@pvab.UUCP>
Date: Sun, 23-Aug-87 13:24:14 EDT
Article-I.D.: pvab.304
Posted: Sun Aug 23 13:24:14 1987
Date-Received: Tue, 25-Aug-87 04:31:51 EDT
Organization: Statskonsult Programvaruhuset AB, Sweden
Lines: 11

This is maybe a dumb question, but what is the intended use of pin 6,
the one named DSR or Data Set Ready in the RS232 standard? I've seen
that some devices (especially modems) uses it, but most ignores it (such
as computers and terminals). Is it really needed for modem-control
signaling or can I simply connect it to pin 20 (DTR) at the other end?
How should it be connected in a null-modem cable when I want to connect
two DTE devices with modem control?
-- 
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