[GreenKeys] Little Army Patch panel: Cable color codes?

[Roy Morgan]

Greenkeyers,

In a recently acquired "TM11-655 Fundamentals of Telegraphy 
(Teletypewriter)", I discovered very brief descriptions of two Army items I 
have:

1) Line Test Unit (a slope fronted box with terminals, jacks, meter, line 
rheostat, and a relay inside). This is intended to repeat neutral line 
signals to the local printer via the relay, allow for local or "distant" 
supply of loop current, and adjust line current to the needed value.  NOTE: 
If you have one of these, the two-prong line cord on it is for *DC 
ONLY*.  Do not plug it into the wall!

2) A little wooden box with 5 rows of 6 jacks intended for temporary 
patching of various parts of a teletype system.  The connections are made 
with a set of solder terminals from what looks like a 25- or 50-pair 
telephone cable.  Thus my question:

What is the standard color code for multiple-pair  telephone/teletype cables?

I have some cables with 50-pin phone company connectors on them, a couple 
of rack panel RJ-45 patch panels with the matching connectors, some punch 
down blocks, and some T-R-S and T-R patch panels. All this will make a fine 
station installation, so I'd like to follow the normal color coding so I 
can keep track of the connections.  I want the whole thing to be 
dis-assemble-able in the event I move in the future.

I understand that the Tip-Ring patch panels are used for loops and the 
Tip-Ring-Sleeve ones are used for audio (telephone and audio TTY 
tones.  I'll be hooking up the DC loops and the audio lines (AFSK, receiver 
outputs, terminal unit inputs) in a useful patch panel array.

Roy
- Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
7130 Panorama Drive, Derwood MD 20855
Home: 301-330-8828 Cell 301-928-7794
Work: Voice: 301-975-3254,  Fax: 301-948-6213
roy.morgan at nist.gov --