TIL there was a real https://en.wikipedia.org/wiki/Teletype_Corporation
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@tomjennings Oh, what was the local mode for? Some sort of serial interface?
At least works a bit like this for Minitels as they have a slightly-nonstandard serial I/O, and a phone line plug that they could self-dial.
At least works a bit like this for Minitels as they have a slightly-nonstandard serial I/O, and a phone line plug that they could self-dial.
@lanodan @tomjennings Local mode functions like a typewriter, not transmitting or receiving remotely.
So you could punch tapes, or run tape to print.
Morkrum-Kleinschmidt Company, lol!
@lanodan
And here is the physical basis for the LINE you are ON when you are metaphorically ONLINE.
OK well now I am annoyed with Wikipedia. It is most definitely not a "digital" line, it's quite analog, ASR-33's are 100 volts, 20 or 60 milliamps, inductive loads, and generate HV spikes that HURT YOU, lol.
https://en.wikipedia.org/wiki/Digital_current_loop_interface
Digital current loop interface