Local battery

In telecommunication, the term local battery has the following meanings:

1. in telegraphy, the source of power that actuates the telegraphic station recording instruments, as distinguished from the source of power that furnishes current to the line.
2. in telephony, a system in which each telephone instrument has its own source of power, as opposed to being powered from the central office.
3. a source of local power for a telephone instrument.

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This article contains material from the Federal Standard 1037C (in support of MIL-STD-188), which, as a work of the United States Government, is in the public domain.