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| INTERCOMMUNICATION
TELEPHONE AUTO The telephone consisted of 8 intercom lines, 5 side stations and 1 exchange line with hold key. The side extensions cannot call the main sets. The side stations are the N20089 and these required a Bellset N20090, which is fitted with an AC bell and a DC buzzer.
Introduced around 1933. |
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Last revised: December 12, 2024FM2 |
