In telecommunication, a common battery is a single electrical power source used to energize more than one circuit, electronic component, equipment, or system.
A common battery is usually an electrolytic device and is usually centrally located to the equipment that it serves. In many telecommunications applications, the common battery is at a nominal -48 VDC. A central office common battery in the battery room supplies power to operate all directly connected instruments. Common battery may include one or more power conversion devices to transform commercial power to direct current, with an electrolytic battery floating across the output.
Famous quotes containing the word common:
“They sang, but had not human tunes nor words,
Though all was done in common as before;
They had changed their throats and had the throats of birds.”
—William Butler Yeats (1865–1939)