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-   -   What voltage does DSL work at (https://www.askmehelpdesk.com/showthread.php?t=203301)

  • Apr 7, 2008, 10:40 AM
    paterson
    What voltage does DSL work at
    What voltage does DSL work at if dailtone is not present?
  • Apr 7, 2008, 11:00 AM
    donf
    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.
  • Apr 7, 2008, 08:50 PM
    KISS
    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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