Newsgroups: sci.electronics
Path: utzoo!henry
From: henry@zoo.toronto.edu (Henry Spencer)
Subject: Re: RS232 Flow Control
Message-ID: <1990Nov13.184339.4756@zoo.toronto.edu>
Organization: U of Toronto Zoology
References: <1990Nov10.013730.28838@julius.cs.uiuc.edu>
Date: Tue, 13 Nov 90 18:43:39 GMT

In article <1990Nov10.013730.28838@julius.cs.uiuc.edu> totty@flute.cs.uiuc.edu (Brian Totty) writes:
>	I want to send flow control information back to a sender across
>	an RS232 serial cable.  What signal is appropriate for this?

There is no, repeat no, standard convention for this.  You have to find
out exactly what your sender is willing to accept, if anything.  It is
common to use CTS and RTS for this.  DSR and DTR are also used.  None of
these lines was originally intended for this purpose.
-- 
"I don't *want* to be normal!"         | Henry Spencer at U of Toronto Zoology
"Not to worry."                        |  henry@zoo.toronto.edu   utzoo!henry