Chapter 5 Parameters and Defaults
Tone Configuration Parameters
•TFreq1, TFreq2, and TFreq3 are the transformed frequencies of the first, second, and third frequencies, respectively. Calculate each value with the following formula:
32767 * cos (2 * pi * F/8000)
where F is the desired frequency in Hz. Set this value to 0 if the frequency does not exist. The range of each value is
For negative values, use the
•Tamp1, Tamp2 and Tamp3 are the transformed amplitudes of the first, second and third frequencies, respectively. Their values are calculated with the following formula:
32767 * A * sin(2*pi*F/8000)
A (amplitude factor) = 0.5 *
where F is the desired frequency in Hz, k is the desired volume in dBm, and n is the number of frequencies (If Sequential is set to 101, n is equal to 1). The ^ symbol means to the order of.
•NumOfOnOffPairs is the number of
If this value is 0, the OnTime1, OnTime2, OnTime 3, OffTime1, OffTime2, and OffTime3 values must also be 0.
•OnTime1, OnTime2, and OnTime3 are the lengths of time that the first, second, and third
Specify each value as a number of samples with the sampling rate of 8 kHz. The range of each value is 0 to 0xffff.
For example, for a length of 0.3 seconds, set a value to 2400.
•OffTime1, OffTime2, and OffTime3 are the lengths of silence after the sound of the first, second, and third
Specify each value as a number of samples with the sampling rate of 8 kHz. The range of each value is 0 to 0xffff.
For example, for a length of 0.3 seconds, set a value to 2400. (See Figure
Figure 5-2 Cadence with Three On-Off Pairs
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•NumOfRepeats is the number of times that the first
For example, if NumOfRepeats is 2, the first
•TotalToneTime is the total length of time that the tone plays. If this value is 0, the tone will play until another call event stops the tone.
This value is in 10 ms units (100 ms = 1 second).
Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide for H.323 (version 3.0)
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