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Elektrisk Bureau Norway payphone post WWii 1946-?

Started by dsk, January 03, 2025, 10:16:23 AM

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dsk


dsk

Autotranslation of the text is not easy reading.  Simplfed explanation: Line in conects to A and B terminals.  Ground=Fterminal i spositive.  When going off hook the exchange gives - voltage on C-terminal.  (Remains until party hangs up)  When party answers +voltage (= ground) pulse on D-terminal, and coin is collected.  (The hole system is a prepay system)

countryman

The result from Google lens is not that bad I guess?