Tone Configuration Parameters
•
NumOfFreqs is the number of frequency components (0, 1 or 2).
Tfreq1 and Tfreq2 are the transformed frequencies of the first and second frequencies, respectively.
•
Their values are calculated 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 –32768 to 32767.
For negative values, use the 16-bit 2's complement value. For example, enter –1 as 65535 or as
0xffff.
Tamp1 and Tamp2 are the transformed amplitudes of the first and second frequencies, respectively.
•
Their values are calculated with the following formulas:
32767 * A * sin(2*pi*F/8000)
A (amplitude factor) = 0.5 * 10^((k+10-(n-1)*3)/20)
where F is the desired frequency in Hz, k is the desired volume in dBm, and n is the number of
frequencies. The ^ symbol means to the order of.
•
Steady controls whether the tone is constant or intermittent. A value of 1 indicates a steady tone and
causes the Cisco ATA to ignore the on-time and off-time parameters. A value of 0 indicates an on/off
tone pattern and causes the Cisco ATA to use the on-time and off-time parameters.
OnTime controls the length of time the tone is played in milliseconds (ms).
•
Specify each value as a number of samples with a sampling rate of 8 kHz. The range of each value
is 0 to 0xffff. For example, for a length of 0.3 seconds, set the value to 2400.
OffTime controls the length of time between audible tones in milliseconds (ms).
•
Specify each value as a number of samples with a sampling rate of 8 kHz. The range of each value
is 0 to 0xffff. For example, for a length of 0.3 seconds, set the value to 2400.
TotalToneTime controls the length of time the tone is played. If this value is set to 0, the tone will play
•
until another call event stops the tone. For DialTone, DialTone2, BusyTone, ReorderTone, and
RingBackTone, the configurable value is the number of 10 ms (100 = 1 second) units.
For the remaining tones, the configurable value is the number of samples with a sampling rate of 8
kHz.
All tones are persistent (until the Cisco ATA changes state) except for the call-waiting tone and the
Note
confirm tone. The call-waiting tone, however, repeats automatically once every 10 seconds while the
call-waiting condition exists.
Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator's Guide for H.323 (version 3.0)
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Chapter 5
Parameters and Defaults
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