From mboxrd@z Thu Jan  1 00:00:00 1970
From: drb at msu.edu (Dennis Boone)
Date: Fri, 28 Feb 2020 17:05:31 -0500
Subject: [COFF] 52-pin D-Sub?
In-Reply-To: (Your message of Sat, 29 Feb 2020 08:58:40 +1100.)
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Message-ID: <20200228220532.17F741ADFAF@yagi.h-net.msu.edu>

 > using the secondary pins as well.

Best I could tell, the major intended purpose of the secondary circuits
was to implement autodialer, especially when those handshaking signals
on the primary were down because there was no connection, so you
couldn't do anything through them yet.

Was there anything else in mind during the spec process?

De