ERICSSON SWITCHBOARD No's 975 - 983


SWITCH BOARDS WITH INDICATOR JACKS

We have already drawn attention to our patented indicator jack in the main body of our Catalogue. It is a combination of an indicator and a jack, such, that the action of inserting the plug to answer restores the indicator; the restoring, however, is mechanically, not electrically, accomplished. The indicator part of the combination consists of a cylindrical tube of metal arranged concentrically round the bush or barrel of the jack and painted white on the outside. Normally this tube is visible merely as a white ring round the bush, but when a call is made, it springs forward about half an inch and immediately attracts the operator's attention. To answer, the plug is inserted as usual, and, being provided with a broad shoulder, pushes the indicator back into its normal position. A lot of work is spared the operators by this arrangement, and, if in addition the ringing-off indicators (as is the case in, all of the boards illustrated below) are automatically restored, the operating of these
boards is very quick and simple.
The indicator jacks do not occupy any more space than a jack and lamp together, no relays are necessary with them, and they may be used for both magneto and battery calling.
We now manufacture the following standard pattern switchboards with indicator jacks.


No. 978.
This is similar to No. 664.
The ringing-off indicators are automatically restored when the plugs fall back into their sockets. The six keys for ringing or speaking on one cord only which are embodied in our No. 664 pattern are here replaced by three smaller keys. The usual parts are included, i.e., hand generator, hand micro-telephone No. 490 with cord No. 2052, night bell, &c.

Catalogue Number   

975   

976   

977   

978

Number of lines   

25   

30   

40   

50

Pairs of Cords and Plugs   

5   

6   

8   

10

Height in Inches   

52   

52   

52   

52

Width in Inches   

20   

20   

20   

20

Weight in Lbs   

138.5   

142.5   

149   

157

PRICE   

41 5 0   

46 17 6   

54 7 6   

66 15 0


No. 980
This board is similar to No. 978, but of larger dimensions. No. 979 is built for 100 lines, No. 980 is fitted for 100 lines, but has capacity for 200 lines. No. 981 is fully equipped for 200 lines. The usual accessories are included.

Catalogue Number   

979   

980   

981

Number of lines   

100   

100   

200

Pairs of Cords and Plugs   

10   

10   

15

Height in Inches   

53   

56   

56

Width in Inches   

23   

23   

23

Weight in lbs   

213   

219   

260

PRICE   

100   

102   

150


No. 983.
This board is similar to our No. 651 enclosed pattern. Here also the clearing indicators are automatically restored by the plugs returning to their sockets. Three service keys are fitted, instead of the six usually included, and a hand set No. 494 with cord No. 2052.  Much space is saved by substituting the indicator jacks for indicators and jacks, and as a result a larger multiple capacity is obtained than in the older pattern.

Catalogue Number   

982   

983

Number of lines   

50   

100

Pairs of Cords and plugs   

10   

15

Height in Inches   

59   

60.25

Width in Inches   

17.75   

23.6

Weight in Lbs.   

157   

238

PRICE   

75   

104


Taken from the Ericsson Telephone Catalogue 1903

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Last revised: April 09, 2000