[GreenKeys] RTTY Answerback Unit

[Alf Fisher]

Hello Greenkeys folks,
One of the essential features of a machine for use on i-Telex is that it 
has an answerback unit and I know that a workaround has been developed 
by the designers.
Unfortunately not every machine has this installed or making the wards 
is a somewhat exacting process that is beyond the ability of those of us 
who do kitchen table engineering!
I was thinking how hard would it be to make an electronic device to 
perform the function.
Has anyone had experience of building an electronic answerback unit that 
could be initiated on receipt of the code.
In building your own, I don’t think there is any good reason why it 
couldn’t have more characters than the normal 20.
I wouldn’t be surprised if someone has written an article in one on the 
various magazines.

Any ideas?

Alf, G3WSD
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