@oldways_9: The Fastest Way to Call for Help (Before Phones) #HowItWorks #Engineering #Innovation #OldTech #FYP

TJ Carter :

Even though it’s old tech but old tech still proven still works harder then some new tech

Methuselah :

Digital?

Richie :

I remember seeing this in front of my elementary school in Staten Island. Red said fire and blue said police.

Bilks Corner :

That’s cool.

user998200150 :

city box, it was wired on a class A Mccollogh loop. the boxes sent 3 rounds of the box code. There is a working example in front of NFPA headquarters. -

dpick13 :

this is neat

theshittymoon :

Forums

Hyze Hazuan :

o9oool899😁

Robin :

Goshima :

Some places use something similar for volunteering. When a call comes in, the station sounds off the public siren to the call box numbers. This'll alert where the incident is located.

Olaaf :

cool, interrupting the power grid to sent morse code, good times

Richie's Ironmongery :

😳😳😳