- revertive signal switch
- revertive signal switch NRT Quittierschalter m
English-German dictionary of Electrical Engineering and Electronics. 2013.
revertive signal switch
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Panel switch — The panel switching system was an early type of automatic telephone exchange, first put into urban service by the Bell System in the 1920s and removed during the 1970s. The Panel and Rotary systems were developed in parallel by Bell Labs before… … Wikipedia
