ERICSSON SWITCHBOARD No. OB 300


768.jpg (11731 bytes)Type OB 300
Wall Pattern Switchboards
Earth Circuit
Local Battery System

OB 300/12 shown

THE CONNECTIONS ARE MADE BY MEANS OF PLUGS AND CORDS.

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

EQUIPMENT
1 JACK per line.
1 CALLING INDICATOR per line.
1 PAIR OF PLUGS AND CORDS (see table for number of cord circuits for each board).
1 CLEARING INDICATOR for each cord circuit.
1 OPERATOR'S PLUG AND CORD.
1 SPEAKING AND RINGING KEY for each cord circuit.
NIGHT BELL.
NIGHT BELL SWITCH.
MICROTELEPHONE. RE 5052 with cord RS 7021.
LIGHTNING PROTECTOR, with arrangement for connecting all lines to earth.
GENERATOR. RH 4160, 4-magnet.

TYPE

OLD TYPE No.

No. of Earth ccts

No. of cord ccts

Height ins

Width ins

Depth ins

Weight in lbs.

OB 300/6

621

6

2

30.50

10.23

9.64

28.00

OB 300/9

622

9

3

33.86

10.23

9.64

33.00

OB 300/12

623

12

4

33.86

10.23

9.64

35.28

OB 300/16

624

16

4

36.69

10.23

9.64

38.58

OB 300/20

625

20

5

37.20

12.00

9.64

45.64

OB 300/25

626

25

5

40.56

12.00

9.64

48.51

OB 300/30

-

30

6

40.56

12.00

9.64

52.92


Taken from the Ericsson Telephone Catalogue 1914

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Last revised: April 29, 2000