central-battery system

central-battery system

[¦sen·trəl ′bad·ə·rē ‚sis·təm]
(communications)
A telephone or telegraph system which obtains all the energy for signaling (and for speaking, in the case of the telephone) from a single battery of secondary cells located at the main exchange.
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Emergency lighting systems as central-battery system with security lights in LED technology 250 St .
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