Why telecommunications devices work with negative DC voltage(-48v DC)?

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Why a Negative voltage (-48V ) is being used in telecom Network equipment?
Posted by:
Binu Balan Uralath
13-April-2015

Question added by abbas saber
Date Posted: 2015/12/25

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1 Answers

by Deleted user

It's the highest and safest compromise voltage to run over long wires

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