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L. M. ERICSSON
SWITCHBOARD OB 400


Type OB 400
Wall Pattern Switchboards
Metallic Circuit
Local Battery System

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FRAMEWORK
Polished walnut, with the jack field covered with fibre.

EQUIPMENT
1 x JACK for each line.
1 x OPERATOR'S CORD AND PLUG.
1 x PAIR OF CORDS with 2-point plugs ee table for number of cord circuits for each board).
1 x SPEAKING AND RINGING KEY for each cord circuit.
1 x CALLING INDICATOR for each line.
1 x CLEARING INDICATOR for each cord circuit.
1 x NIGHT BELL.
NIGHT BELL SWITCH.
GENERATOR. RH 5120, 5-magnet.
MICROTELEPHONE. RE 5052, with Cord RS 7021.
TESTING KEY.

The OB 400/12 shown pictured to the right.


TYPE OLD TYPE No. No. of metallic ccts No. of cord ccts Height ins Width ins Depth ins Weight in lbs.
OB 400/6 627 6 2 30.50 10.23 9.64 30.87
OB 400/9 628 9 3 33.86 10.23 9.64 33.00
OB 400/12 629 12 4 33.86 10.23 9.64 38.58
OB 400/16 630 16 4 36.69 10.23 9.64 41.89
OB 400/20 631 20 5 37.20 12.00 9.64 48.51
OB 400/25 632 25 5 40.56 12.00 9.64 52.92
OB 400/30 - 30 6 40.56 9.64 9.64 57.33


Taken from the Ericsson Telephone Catalogue 1914

 
 
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Last revised: March 28, 2024

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