[GreenKeys] Siemens T1000Z

[Nico de Jong]

Ref my earlier mail about T1000.
The tty from the cold war museum is quite different from the one I have. The 
cards between the power supply and the printer mechanism are very different; 
the part where the input/output cable is attached, is also very different.
I am therefore beginning to suspect that the one from the museum is a model 
which does not use current loop, but some from of AFSK
Would there be anyone around with knowledge of such a system ?
73, Nico

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