|Type OA 850
Local Battery System
THE CONNECTIONS ARE MADE BY MEANS OF KEYS.
Woodwork polished walnut and the legs enamelled cast iron.
The key and indicator field is covered with fibre.
The CONNECTING KEYS are arranged in vertical or horizontal rows (see note),
with as many keys in each row as the number of lines for which the board is built.
The number of connections which can be made at the same time is equal to the number of rows of connecting keys.
1 x CALLING KEY for each line.
1 x OPERATOR's KEY for each row of connecting keys.
1 x CALLING INDICATOR for each line.
1 x CLEARING INDICATOR for each row of connecting keys.
NIGHT BELL SWITCH.
GENERATOR. RH 5000, 5 magnet.
MICROTELEPHONE. RH 5052, with cord RS 7021.
In types OA 850/10, OA 850/16, the keys are arranged in vertical rows in all the other types they are arranged horizontally.
This type of board is not usually kept in stock.
Last revised: October 08, 2019