[GreenKeys] Jack Selection for TTY equipment

[Virgil Bierschwale]

Interesting.
In the navy from 76 - 82 the red stood for the crypto portion and the black
stood for the unsecured portion of the circuit.

Basically the 1203 was the black portion of the circuit and the 1210 was the
crypto portion

>From a technical standpoint I believe they were identical although they had
two separate numbers

http://www.virhistory.com/navy/rtty/patch/sb1210-02.jpg
http://www.virhistory.com/navy/ships/cv41-2/DSCN0159.JPG


-----Original Message-----
From: greenkeys-bounces at mailman.qth.net
[mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of Jim Haynes
Sent: Friday, November 15, 2013 8:51 PM
To: hwhall at compuserve.com
Cc: greenkeys at mailman.qth.net
Subject: Re: [GreenKeys] Jack Selection for TTY equipment

On Fri, 15 Nov 2013, hwhall at compuserve.com wrote:

> If interested, I have in my stuff a couple of vintage 1/4 inch 
> teleprinter plugs with red and black colored shells. They came off 
> some old Teletype stuff we played with when I was in college at our 
> college industrial arts department ham station.
> 
"And therein lies a tale..."

In U.S. military and Bell System practice the plug with the red shell is the
printer, and the one with the black shell is the keyboard.  In Western Union
equipment it's exactly the opposite.

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