[GreenKeys] M28 ASR full duplex?

[Duncan Brown]

I'm mainly a Kleinschmidt guy, and I have never had to dig into the M28 
wiring before.  Other than change a couple of motor-start capacitors, my 
M28s have just run.

But now that I am getting into this M28 ASR wiring for our TMC station, 
it looks like the M28 (especially the AN/UGC-6) was mainly used with TX 
& RX in just one loop.

Was the M28 ever used in full-duplex (separate TX & RX loops)?

Ham TUs like HAl & Dovetron would take one loop and separate the TX & RX 
signals.  But what about military units like the CV-2460?  Just looking 
at the manual, it looks like it needs separate TX & RX connections from 
the TTY, but the UGC-6 does not seem to offer that option. (At least not 
from looking at the UGC-6 schematic, Fig 12-38.)

 From the Teletype Corp. schematics, I can see that the M28 ASR has very 
flexible wiring and you could bring out the keyboard contacts 
separately.  But I'm surprised that the UGC-6 schematic doesn't show 
that option. Or is there another schematic to show separate TX &RX wiring?

Thanks,

Duncan
K2OEQ