[OT] Nostalgia alert!

[Ric Werme]

> http://phreakmonkey.com/index.php/archives/134
I identified with the 3rd photo.  The soft cups for the handset were
typical of the genre.

Error injection was trivial - tap the handset with a pencil.

Of course the circuitry was analog - other than dialing, the
phone system was analog.  You can make an amplifier with one
transister, an AM radio with six.  A flip-flop takes at least
two, at least if you want a useful one.