Here is some telephone history from Tekniikan museo museum located at Helsinki Finland.
Here is once possibly the most common phone model used in Finland (Ericsson Dialog from 1964).
Ans one very old telephone
Here is the first automatic telephone center in Finland from 1922.
Those pictures were taken few months ago. I have posted this material earlier to Facebook.
Some related links:
Telephone sounds at http://www.evan-doorbell.com/
Book on telephone electronics at https://archive.org/details/UnderstandingTelephoneElectronics4thEd
7 Comments
Tomi Engdahl says:
How Telephone Phreaking Worked
https://www.youtube.com/watch?v=4tHyZdtXULw
Wie says:
It’s http://www.epanorama.net/newepa/2019/08/08/telephone-history-from-tekniikan-museo/ very interesting article
Tomi Engdahl says:
STROWGER Telephone Exchange mechanical machine
https://www.youtube.com/watch?v=BvhqZbtU_Zs
A Fascinating look at #Vintage #Technology Strowger Telephone Exchange.
Extra footage more in depth chat https://youtu.be/JrO2KklR4xA
Tomi Engdahl says:
Buying An Old 1960′s Strowger Telephone Exchange For Restoration!
https://www.youtube.com/watch?v=rnZ2HcTYyUM
Tomi Engdahl says:
https://tekniikanmuseo.wordpress.com/2021/07/15/esinekummi-tekee-nakyvaksi-tekniikan-ja-teollisuuden-tarinaa/
Tomi Engdahl says:
https://en.wikipedia.org/wiki/Telephone_hybrid
Tomi Engdahl says:
2600? How Phreaking Really Worked
https://www.youtube.com/watch?v=8PmkUPBhL4U