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1 janv. 1889 - Self-winding telephone exchange
Description:
Strowger invented the self-winding telephone exchange in 1889. It consisted in calls without an operator.
Ajouté au bande de temps:
9 déc. 2017
0
0
255
Telephony
Telephony timeline
Date:
1 janv. 1889
Maintenaint
~ Il y a 135 ans