ERICSSON
SWITCHBOARD No's N440 & N441
C. B. S. Floor Switchboards
 

n440.jpg (11956 bytes)Central battery signalling switchboards are ideal as satellite exchanges in areas where main installations are C.B. or automatic. They are economical compared with full C.B. and give better operating facilities than magneto.

These switchboards are fitted throughout with our totally enclosed type of indicator.   Double positive supervision is provided.
Ticket clip and box for records of special calls. Mounting space for an automatic dial, when required to work in conjunction with an automatic exchange.

A Milliampere-meter to detect leakage of current on the lines is fixed to the front panel. 

A 22-Volt battery of large type primary cells will operate these switchboards.

N 440 shown pictured to the right.

Code No.   Exchange lines   Extension lines   Cord circuits
N440   10   40   10
N441   5   20   7

 

Taken from the Ericsson catalogue, edition 26

 
 
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Last revised: October 24, 2025

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