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L. M. ERICSSON
SWITCHBOARD OB 450
Type OB 450
Wall Pattern Switchboards
Metallic Circuit
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THE CONNECTIONS ARE MADE BY MEANS OF PLUGS AND CORDS.

FRAMEWORK
Polished walnut. The jack and indicator field is covered with fibre.

EQUIPMENT
1 x JACK for each line.
1 x PAIR OF CORDS and 2-point plugs (see table for number of cord circuits on each board).
1 x SPEAKING AND RINGING KEY for each cord circuit.
1 x RINGING BACK KEY.
1 x CALLING INDICATOR for each line.
1 x CLEARING INDICATOR for each cord circuit.
NIGHT BELL.
NIGHT BELL SWITCH.
GENERATOR. RH 4000, 4-magnet.
MICROTELEPHONE. RE 5052, with cord RS 7021.

The OB 450/12 shown pictured to the right.

TYPE No. of Metallic ccts No. of cord ccts Height ins Width ins Depth ins Weight in lbs.
OB 450/6 6 2 21.85 9.53 11.53 29.76
OB 450/9 9 3 21.85 9.53 11.53 31.97
OB 450/12 12 4 21.85 9.53 11.53 37.50
OB 450/16 16 4 24.40 11.50 11.53 40.80
OB 450/20 20 5 24.40 11.50 11.53 46.30
OB 450/25 25 5 29.96 13.26 11.53 50.71
OB 450/30 30 6 26.96 13.26 11.53 55.12


Taken from the Ericsson Telephone Catalogue 1914

 
 
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Last revised: March 28, 2024

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