ERICSSON SWITCHBOARD No. OB 6400


768.jpg (11731 bytes)Type OB 6400
Multiple Switchboards
With Combined Jacks and Indicators (Mechanically Restored)
Local Battery System
Double Supervision
Metallic Circuits

OB 6400/100 shown

FRAMEWORK
One-position section polished walnut with the jack and indicator field covered with fibre; with a multiple capacity of 40 strips each for 20 jacks.

EQUIPMENT
100 COMBINED JACKS AND INDICATORS for local lines.
15 PAIRS OF CORDS with 2-point plug.
15 DOUBLE SPEAKING AND RINGING KEYS.
1 DOUBLE SPEAKING KEY.
1 DOUBLE RINGING KEY.
1 RINGING KEY for Power Generator.
1 PRESS BUTTON for closing transmitter circuit.
1 TESTING KEY.
30 VISUAL CLEARING INDICATORS, 2 for each cord circuit.
15 DOUBLE CLEARING RELAYS.
1 PILOT VISUAL INDICATOR for calling.
1 PILOT VISUAL INDICATOR for clearing.
NIGHT BELL.
NIGHT BELL SWITCH.
RINGING VIBRATOR for supervising the outgoing ringing current.
GENERATOR. RH15080, 5-magnet.
MICROTELEPHONE. RE 4110 (differentially wound Receiver) with cord RS 9502.

This type of switchboard is not usually kept in stock.

NOTE. The calling indicators are mechanically restored by the action of the plug.
The clearing indicators and pilot visual indicators are self-restoring.

DIMENSIONS (inches)
Height 76.81
Width 27.00
Depth 34.18

Approx. Weight, 388 lbs.

Type OB 6400/200
200 LINE SWITCHBOARD
Consisting of:-
2 1-position sections CB 6400/100.
Which have an additional equipment of 10 strips of multiple series jacks each for 20 lines arranged in 4 panel multiples and cabled with 60 wire 0.6 m/m wool insulated mat cables for 3 sections and with mat cables for return to the connecting racks of sections Nos. 1 and 2.

Type OB 6400/300
300 LINE SWITCHBOARD
Consisting of:-
3 1-position sections CB 6400/100.
Which have an additional equipment of 25 strips of multiple series jacks each for 20 lines arranged in 4 panel multiples and cabled with 60 wire 0.6 m/m, with wool insulated mat cables for 4 sections and with mat cable for return to the connecting racks of sections Nos. 1, 2 and 3.

Type OB 6400/400
400 LINE SWITCHBOARD
Consisting of:-
4 1-position sections CB 6400/100.
Which have an additional equipment of 40 strips of multiple series jacks each for 20 lines, arranged in 4 panel multiples and cabled with 60 wire 0.6 m/m wool insulated mat cables for 5 sections and with mat cables for return to the connecting racks of sections Nos. 1, 2, 3 and 4.

Type OB 6400/500
500 LINE SWITCHBOARD
Consisting of:-
5 1-position sections CB 6400/100.
Which have an additional equipment of 65 strips of multiple series jacks each for 20 lines, arranged in 4 panel multiples and cabled with 60 wire 0.6 m/m wool insulated mat cables for 6 sections and with mat cables for return to the connecting racks of sections Nos. 1, 2, 3, 4 and 5.

Type OB 6400/600
600 LINE SWITCHBOARD
Consisting of:-
6 1-position sections CB 6400/100.
Which have an additional equipment of 90 strips of multiple series jacks each for 20 lines, arranged in 4 panel multiples and cabled with 60 wire 0.6 m/m wool insulated mat cables for 7 sections and with mat cables for return to the connecting racks of sections Nos. 1, 2, 3, 4, 5 and 6.

Taken from the Ericsson Telephone Catalogue 1914

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Last revised: April 29, 2000