13 Jun
2012
13 Jun
'12
5:44 a.m.
----- Original Message -----
From: "Tony Duell" <ard at p850ug1.demon.co.uk>
To: <cctalk at classiccmp.org>
Sent: Tuesday, June 12, 2012 3:59 PM
Subject: Re: Microvax connecting from console (MMJ) to DB25(female) DCE port
I have no clue what they were used for. When I got my MicroVAX I looked
around for months and found a couple MJJ cables and some VT-525s plus
keyboards so I just use them without adapters. Those adapters were in the
box with the cables so I snagged them too (recycler).
Product
Description Part Number: 482560001 New, Used, Refurbished, and
Repair of AMPHENOL RJ45-M TO MMJ-F ADAPT.
Are you sure this has anythign to do with ethernet? My guess is that it's
sued to linke DEC serial ports (MMJs) to the modern 'structured wiring'
found in soem buildings. You'd use them in pairs, one ant each end of a
building cable so as to connect the 2 serial devices.
And, please, it's not RJ45 unless you are taling about a particular US
telephone wiring scheme. 10baseT ethernet, etc does not use an RJ45
conenctor. It's an 8p8c.
-tony