Re: DEC/MMJ connectors

From: David J Dachtera (djesys.nospam_at_comcast.net)
Date: 04/30/05 

Date: Sat, 30 Apr 2005 11:01:13 -0500

Dave Froble wrote:
>
> GreyCloud wrote:
> > Does anyone know where I can get a 6-pin DEC/MMJ to female
> > db25 cable??
> > I managed to acquire an unused VT420 terminal.
>
> I'm thinking that you may be mistaken on what you need. The VLC, if my
> memory is any good, takes an MMJ.

...and has a DB25M serial port, as well.

> VT-420s also accept up to 2 MMJs.

Some variants also have a DB25M. Likewise, some VT320 and VT510
terminals.

> This allows for two sessions on the terminal. This capability can also
> be provided by some (most) of the DECserver terminal servers.
>
> Unless I'm mistaken, you need a flat 6-conductor cable with an MMJ on
> each end. The MMJs are reversed, ie; one end with the tab up, and the
> tab down at the other end. This flips xmit/recv, gnd/gnd, and DTR/DSR.
>
> I think there may have been an international model of the VT-420 with a
> DB25 connection.

Quite. Indeed, there was, to the best of my recollection (doesn't say
much, I know...). 

-- 
David J Dachtera
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