Type OA 500Cordless Switches, Wall Pattern
(Pyramid Type)
Metallic Circuit
Local Battery System
Type OA 500
Cordless Switches, Wall Pattern
(Pyramid Type)
Metallic Circuit
Local Battery System
OA 500/5 shown
To be used in conjunction with any ordinary telephone instrument.
THE CONNECTIONS ARE MADE BY MEANS OF KEYS.
FRAMEWORK
Polished walnut.
EQUIPMENT
1 KEY for each line for connecting the lines to the telephone instrument.
CONNECTING KEYS The number varies with the capacity of the board.
1 CALLING AND CLEARING INDICATOR per line.
NIGHT BELL.
NIGHT BELL SWITCH.
CARBON LIGHTNING ARRESTER.
|
TYPE |
OLD TYPE No. |
No. of Circuits |
Height ins |
Width ins |
Depth ins |
Weight in lbs. |
|
OA 500/3 |
3 |
14.97 |
7.09 |
4.33 |
8.82 |
|
|
OA 500/4 |
4 |
14.97 |
7.09 |
4.33 |
9.48 |
|
|
OA 500/5 |
5 |
14.32 |
9.04 |
4.33 |
14.32 |
|
|
OA 500/6 |
751 |
6 |
17.32 |
9.05 |
4.33 |
15.43 |
Taken from the Ericsson Telephone Catalogue 1914
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