Type OF 300
Multiple Switchboards
(One Position Section)
Common Battery System
Double Supervision
Lamp Signalling
 OF 300/100 shown pictured to the right.FRAMEWORK
Polished walnut, each section has a multiple capacity of 30 strips of jacks each for 20 jacks.
EQUIPMENT
1 x ANSWERING JACK for each line mounted in strips of 10.
1 x PAIR OF CORDS and 3-point plugs (see table for number of cord circuits on each board).
1 x SPEAKING AND RINGING KEY for each cord circuit.
1 x DOUBLE SPEAKING KEY.
1 x DOUBLE RINGING KEY for Hand Generator.
1 x CALLING LAMP-JACK AND LAMP for each line mounted in strips of 10.
2 x SUPERVISORY LAMP-JACK AND LAMP for each cord circuit mounted singly.
1 x PILOT LAMP-JACK AND LAMP for calling.
1 x RINGING VIBRATOR for supervising the outgoing ringing current.
1 x RINGING KEY for Power Generator.
NIGHT BELL.
NIGHT BELL SWITCH.
GENERATOR. RH 5080, 5-magnet.
MICROTELEPHONE. RE 5110 (differentially wound), with cord RS 9501.
NOTE
The line relays are mounted on a special rack.
This type of board is not usually kept\in stock.
|
TYPE |
No. of Metallic Ccts |
No. of cord ccts |
Height ins |
Width ins |
Depth ins |
Weight in lbs. |
|
OF 300/5 |
50 |
10 |
60.80 |
23.62 |
29.62 |
154.50 |
|
OF 300/100 |
100 |
15 |
60.80 |
23.62 |
29.62 |
231.50 |
Type OF 300/200
200 LINE SWITCHBOARD
Consisting of:-
2 x 1-position sections OF 300/100 (including line relays and rack) which have the additional equipment of 10 strips of multiple branching jacks, each for 20 lines, arranged in 4 panel multiples and cabled with 80 wire 0.6 m/m wool insulated mat cables for 3 sections.
Type OF 300/300
300 LINE SWITCHBOARD
Consisting of:-
3 x 1-position sections OF 300/100 (including line relays and racks), which have the additional equipment of 25 strips of multiple branching jacks, each for 20 lines, arranged in 4 panel multiples, and cabled with 80 wire 0.6 m/m wool insulated mat cables for 4 sections.
Type OF 300/400
400 LINE SWITCHBOARD
Consisting of:-
4 x 1-position sections OF 300/100 (including line relays and racks), which have the additional equipment of 40 strips of multiple branching jacks, each for 20 lines arranged in 4 panel multiples and cabled with 80 wire 0.6 m/m wool insulated mat cables for 5 sections.
500 LINE SWITCHBOARD
Type OF 300/500
Consisting of:-
5 x 1-position sections OF 300/100 (including line relays and rack), which have the additional equipment of 65 strips of multiple branching jacks each for 20 lines arranged in 4 panel multiples and cabled with 80 wire 0.6 m/m wool insulated mat cables for 6 sections.
Type OF 300/600
600 LINE SWITCHBOARD
Consisting of:-
6 x 1-position sections OF 300/100 (including line relays and rack), which have the additional equipment of 90 strips of multiple branching jacks each for 20 lines arranged in 4 panel multiples and cabled with 80 wire 0.6 m/m wool insulated mat cables for 7 sections.
Taken from the Ericsson Telephone Catalogue 1914
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