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Is there a standard for Call Progress tone level?

thread461-75517

Is there a standard for Call Progress tone level?

Is there a standard for Call Progress tone level?

(OP)
I am trying to find out if there is a standard for Call Progress tone level from the audio output of the Modem.  I saw somewhere mentions that -13dBm0 for the tone level.  What would it be in term of output Voltages of the modem to the audio device input?

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