ERICSSON SWITCHBOARD No. OB 3500


768.jpg (11731 bytes)Type OB 3500
Floor Pattern Switchboards
With Combined Jack and Indicator (Mechanically restored)
Metallic Circuit
Local Battery System

OB 3500/25 shown

FRAMEWORK

Woodwork, polished walnut, with the jack field covered with fibre. Legs enamelled cast iron.

EQUIPMENT
1 COMBINED JACK AND INDICATOR for each line.
1 PAIR OF CORDS with 2-point plugs (see table for number of cord circuits on each board).
1 SPEAKING AND RINGING KEY for each cord circuit.
1 DOUBLE SPEAKING KEY.
1 DOUBLE RINGING KEY for Hand Generator.
1 DOUBLE BATTERY RINGING KEY.
1 POWER GENERATOR RINGING KEY.
1 TEST JACK.
1 TESTING KEY.
1 CLEARING INDICATOR for each cord circuit.
NIGHT BELL.
NIGHT BELL SWITCH.
GENERATOR. RH 5000, 5-magnet.
MICROTELEPHONE. RE5052, with cord RS7021.

This type of switchboard is not usually kept in stock.

NOTE
The calling indicators are mechanically restored by the action of the plug.

TYPE

No. of metallic ccts

No. of cord ccts

Height ins

Width ins

Depth ins

Weight in lbs.

OB 3500/25

25

5

57.30

16.92

31.8

88.20

OB 3500/50

50

10

58.07

22.05

31.8

132.30

OB 3500/105

105

15

61.81

26.18

31.89

198.45

(This type is only supplied for the extension of Old Exchanges. It is now superseded by type OB 6020.)

Taken from the Ericsson Telephone Catalogue 1914

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Last revised: April 29, 2000