For DTMF digits and other events representable as tones, this field describes the power level of the tone, expressed in dBm0 after dropping the sign. Power levels range from 0 to -63 dBm0. The range of valid DTMF is from 0 to -36 dBm0.

public int Volume { get; set; }

Public Property Volume As Integer
	Get
	Set

public:
property int Volume {
	int get ();
	void set (int value);
}

member Volume : int with get, set