Unit of measurement dahdi_monitor

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Asterisk Users 2 Comments

I am studying about echo cancellation in asterisk and I want to use the
numeric information from dahdi_monitor verbose for my research.
Unfortunately, I couldn’t find anything about the unit of measurement used
in this tool. Which unit is used to measure the signal level?

2 thoughts on - Unit of measurement dahdi_monitor

  • dahdi_monitor uses the sample values in L16 format.

    They are in orders of magnitud of G.711. See tables 5 and 6 of the G.711
    spec. In the end, the reference value is the dBm (google that).

    Moises Silva
    Senior Software Engineer
    Sangoma Technologies Inc. | 100 Renfrew Drive, Suite 100, Markham ON L3R 9R6
    Canada
    t. 1 905 474 1990 x128 | e.
    href=”mailto:moy@sangoma.com”>moy@sangoma.com