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    paterson's Avatar
    paterson Posts: 1, Reputation: 1
    New Member
     
    #1

    Apr 7, 2008, 10:40 AM
    What voltage does DSL work at
    What voltage does DSL work at if dailtone is not present?
    donf's Avatar
    donf Posts: 5,679, Reputation: 582
    Printers & Electronics Expert
     
    #2

    Apr 7, 2008, 11:00 AM
    DSL operates at 0 to 5 VDC. Most ordinary household= lines work off a dedicated line in the Phone Companies Central that handles digital signals only and not the Analog voice ranges.

    The speed of DSL is a statement of "Bit Encoding or Bit Stuffing" to process the logical Ones and Zeros.

    In order to get a visual of an active DSL line, you would need an O Scope and the freq that it is working at to get your measurements.

    A much better tool is a Network Sniffer, which is designed to actually become part of the network and monitor the traffic back and forth on the Network side of the traffic.
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
    Uber Member
     
    #3

    Apr 7, 2008, 08:50 PM
    Don:

    Page 10 here http://datasheets.maxim-ic.com/en/ds...61-MAX4363.pdf

    Would indicate that the levels for DSL are around 28.4 V p-p differential across the line.

    Since your typically transformer coupled, loop power nor dial tone appear to be required.

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