[GreenKeys] TTY protocol

[Sheldon Daitch]

I suppose you could use codings to turn on and off equipment as desired.

When VOA ran an HF RTTY system, we used FAXFAX to start
the tape punches and NNNN to stop the tape punches for our torn tape
relay.

FAXFAX was our term for the message traffic between the stations and
Washington HQ, and even today, the "official" messages are still slugged
FAXFAX, even though we have gone long past the paper tape.  (But
running the RTTY shift was a lot more fun!!)

Actually, I think the machines were really coded for NNN to stop, and
normally, three of the four Ns in a series would stop the reperf. 

We never used ZCZC, but maybe no one ever thought about that.

73
Sheldon

H.W.Hall wrote:
> I seem to recall reading somewhere (long ago) that NNNN was used to signal
> the receiving equipment to turn off the teleprinter motor. If that is true,
> the I suppose the ZCZC must have been to restart it. Does that jive with
> anyone else's recollections?
> --Wayne
>   WB4OGM   
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