Wow! ASCII art! Takes me all the way back to my High School days in 1976 when we used Teletype terminals with 300 baud acoustic modems to write programs in BASIC.
I tell the college age set about this and they look at me like I am from another planet (OK, true but different discussion) until I show them pictures of the setup.
“Yeah but did you have an IBM Selectric typewriter as your input keyboard, monitor and output?! (to go along with that lightning fast 300 baud acoustic coupler modem)”
We had the “IBM Serektrik-correktrik” with either the white out tape, and later the adhesive tape that pulled the strike out.
That acoustic coupler (modems in general) was a mystery. It was years before someone clearly explained modulate-demodulate!
KYPD