What is the voltage in the telephone network?

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IliaBrz2017-12-11 00:35:57

Telephony

IliaBrz, 2017-12-11 00:35:57

What is the voltage in the telephone network?

What are the voltages on the telephone line during talk, call and idle? Variable or permanent?

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IliaBrz, 2017-12-11
@IliaBrz

During downtime - constant 60V;
During a call - variables 48 - 110V (25 Hz);
During a conversation - constant 20V.
All values change depending on which telephone exchange is being used.

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