File talk:HebdrehwaehlerbatterieOrtsvermittlung 4954.jpg

This file has been used in:   99 Percent Invisible (October 3, 2013). "The Design Switch That Revolutionized Telephone Communications". Slate.

External re-uses

• https://historiatelefonia.com/2018/11/08/conmutacion-automatica-sistemas-paso-a-paso/
• https://adiccon.de/von-der-handvermittlung-zu-all-ip-selbstwaehlferndienst-2/?cn-reloaded=1
• https://www.kobv.de/wp-content/uploads/2021/06/2021-06-07-Koch-KOBV-Von-Maschinen-und-Menschen-Bibliotheken-und-Intelligenz_public.pdf
• https://www.haupt.ch/magazin/natur/50-die-unsere-welt-veraenderten-das-candlestick-telefon/
• https://99percentinvisible.org/episode/strowger-switch-purple-reign-redux/
• https://de.readkong.com/page/von-maschinen-und-menschen-bibliotheken-und-intelligenz-2809419
• https://img.alphons-adventurer.de/Wikipedia_Images:HebdrehwaehlerbatterieOrtsvermittlung_4954.jpg