In this installment of "Dial Equipment Appreciation", we'll talk about the big ringing machine and how it works!

Previous ringing video:    • How does telephone ringing work?  

Thanks to Evan Doorbell, atlantatelephonehistory.org, and Phil McCarter
http://www.evan-doorbell.com
http://atlantatelephonehistory.org/at...
   / sxsphil  

00:00 Intro
00:30 P-Type ringing machine overview
02:48 Motors
03:55 Coin Voltage Generator
04:57 Ringing Generator
05:48 Tone Alternator
15:13 Interrupters
18:03 Ringing Machines in Storage