Question
The nominal voltage supplied to a telephone line by the exchange battery is:
Option 4 : -48V DC
Detailed Solution
सही उत्तर -48V DC है।
Telephone exchanges use a -48V DC battery supply for the subscriber lines. The negative polarity reduces corrosion of the cables.
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prepsnap.in • Domain SpecificQuestion:
The nominal voltage supplied to a telephone line by the exchange battery is:
Correct Answer: -48V DC
Telephone exchanges use a -48V DC battery supply for the subscriber lines. The negative polarity reduces corrosion of the cables.