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What is the voltage of telephone line?

Asked Sep 7, 2011, 05:26 AM — 3 Answers
What is the voltage of telephone line?

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Curlyben's Avatar
Curlyben Posts: 18,081, Reputation: 8728
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#2

Sep 7, 2011, 05:28 AM
Where are you located as it varies depending on your country and supplier.
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ebaines's Avatar
ebaines Posts: 10,043, Reputation: 5534
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#3

Sep 12, 2011, 01:03 PM
Assuming the US, and assuming that the telephone line is a regular voice line: there is a nominal -48 volt DC on the pair when on-hook, and ringing voltages are typically 90 volts AC (less in some countries).
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Stratmando Posts: 10,428, Reputation: 2515
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#4

Sep 12, 2011, 04:02 PM
I see off hook around 6-9 volts DC.
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