Ever held onto the end of the wires from those dial phones? They are mini-generators, shocks the hell out of you trying to dial a number (cant remember if 9 or 0 was the worst, the hole furthest from that end-stop).
Also, an amazing weapon if needed, not like today's plastic nonsense. Yeet an intruder with that phone and they are done for.
Pretty sure they were phased out quite quickly. Props to the ppl of the time though, went pretty fast from telegram (the OG version of it by tapping a lever) to manual exchanges (someone plugging your line to another line by having to ask) to those dial phones, to digital. Now tik-tok yay