[GreenKeys] need confirmation of tty plug colors

[gil smith]

Hi folks:

A quick question on conventions for tty plug colors, as I am about to post 
my TTY-Connect stuff and I am not certain I have this correct:

For a tty with full-duplex wiring, the keyboard/TD contact loop is called 
the TX loop and the plug color is black;  the selector-magnet loop is 
called the RX loop, and the plug color is red.

Is this correct, or do I have red/black or rx/tx backwards?

thanks for a quick reply,

gil



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