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The Portable Commutator was a telecommunications device that was used by the military during World War I. It was manufactured by Northern Electric Company.[1] It was used as a one-wire telegraphic switchboard.[2]
References edit
- ^ Douglas Hunter (January 5, 2018). "Nortel". The Canadian Encyclopedia. Retrieved February 15, 2021.
- ^ Savid Vye (May 15, 2012). "Goliath's Fall". Microwave Journal. Retrieved February 15, 2021.
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