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    dereje2003's Avatar
    dereje2003 Posts: 1, Reputation: 1
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    #1

    Sep 7, 2011, 05:26 AM
    What is the voltage of telephone line?
    What is the voltage of telephone line?
    Curlyben's Avatar
    Curlyben Posts: 18,514, Reputation: 1860
    BossMan
    		  
    #2

    Sep 7, 2011, 05:28 AM
    Where are you located as it varies depending on your country and supplier.
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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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).
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
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    #4

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