PAX 22 Type
This small automatic switchboard is designed for a maximum of 22 lines and is non-extensible. The initial equipment may be as low as six lines, so that it is ideal for small offices, etc. It is arranged for a maximum of three connecting circuits and wiring is provided for the full capacity of the board.
Facilities such as, round call, preference, conference, tie-line working, etc., can be readily incorporated.
Special care is taken to ensure a trouble-free system; all items of equipment are enclosed in dust-proof covers, and all relays fitted with twin contacts.
The board operates from 24 Volts; which may be from a small capacity battery or a rectifier where A.C. supply is available.
Dimensions:- 4 feet 6 inches high x 2 feet 1 inch wide x 10 inches deep.
Model No. 20449A
Taken from the Ericsson Telephone Catalogue, edition No. 26, Supplement 1935
In the 1960's this PAX was initially equiped with 15 lines and 2
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