Bell Labs Record Article on the Trouble Recorder: https://telephonecollectors.info/index.php/browse/bc-switching-library/western-electric/weco-switching-documents/weco-crossbar/no-5-crossbar-book/1053-24-troublerecording/file
Connections Museum on Twitter: https://twitter.com/museumofcomm
Disclaimer: Mask usage is required by museum volunteers. During and after filming, we observed all possible safety precautions, including opening doors and windows, turning on blowers, and blocking off time where nobody else was in the building. The camera person was Astrid, and she and I live together. Every effort was made to film safely, and in a way that won't harm other people.
0:00 Intro
1:08 Trouble cards
2:53 History of trouble recording
6:55 Office Test Frame
8:03 How do markers know when they have trouble?
13:30 How trouble cards are punched
20:00 How we fixed the recorder