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Corded telephone switchboard demo
Автор: Wim der Kinderen
Загружено: 2024-12-05
Просмотров: 1111
Описание:
Manually operated switchboards have been used since the early days of telephony in the 1880s. This video is a demonstration of their functionality. My specimen is a model CB873 corded switchboard or PMBX (Private Manual Branch Exchange). The second part of the video provides details of its operation.
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