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[برق و الکترونیک] برد سوییچ تلفن برد سوییچی برای برقراری اتصال بین خطوط تلفن و مدارهای مربوط به آنها.
پیشنهاد کاربران
A telephone switchboard was a device used to connect circuits of telephones to establish telephone calls between users or other switchboards, throughout the 20th century. The switchboard was an essential component of a manual telephone exchange, and was operated by switchboard operators who used electrical cords or switches to establish the connections.
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