5 ms·

Also in San Francisco. https://www.sfgate.com/local/article/San-Francisco-historic-fire-alarm-boxes-SFFD-16307778.php https://www.sfgate.com/local/article/San-

• Animats 3y ago
  I was once recruited by a consulting firm that developed the control center for the SFFD, and visited the command center. They had computers listening to the pull box circuits and displaying box locations, but they kept the wind-up Morse inker to put dashes on a paper tape, and its bell, in case that failed. That was pre-cell phone, though.