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Trapezoidal or Sinusoidal ringin

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  • #34602 Reply
    Ravi Shiroor

    I am designing an IAD and I need to choose between Trapezoidal
    ringing or Sinusoidal ringing. I need to know the answers to
    following questions to help me in deciding. I appreciate the answers,
    to then and any other inputs.

    1. Which (T or S) is more commonly used in PBX/IAD FXS ports?
    2. Do the POTS handsets work with both T and S ringing?
    3. Do FXO interfaces on PBXs work with both T and S ringing?


    #34603 Reply

    Hope this could be a help,
    In my experience I have seen sinusoidal ringing (this is what local exchanges provides), it has a purpose: Class services allow you to have distinctive ringing for example, therefore changing the cadence and frecuency you can do it, the S ringing is the solution. Not sure but my belive is the T rininging could no work in the way customers use to hear it.
    Hop it helps you

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