Cisco ATA188-I2-A Administration Guide - Page 119
Tone Parameter Syntax—Extended Formats, Extended Format
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Chapter 5 Parameters and Defaults Tone Configuration Parameters Tone Parameter Syntax-Extended Formats Two types of extended format exist for the Cisco ATA tone parameters: • Extended Format A, page 5-43-This format can be used for the following tone parameters: - DialTone - BusyTone - RingbackTone - CallWaitTone - AlertTone • Extended Format B, page 5-44-This format can be used only for the ReorderTone parameter. Extended Format A Each tone is specified by 11 integers, as follows: parametername:NumOfFreqs,Tfreq1,Tamp1,Tfreq2,Tamp2,NumOfOnOffPairs,OnTime1, OffTime1,OnTime2,OffTime2,TotalToneTime • parametername is the name of the tone. • NumOfFreqs = 100 + the number of frequencies in the tone. (Therefore, NumOfFreqs = 101 for one frequency, and 102 for two frequencies.) • 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 formula: 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. • NumOfOnOffPairs is the number of on-off pairs in the cadence of the tone. Valid values are 0, 1 and 2. Use 0 if the tone is steady. • OnTime1 and OnTime2 values are the lengths of time the tone is played for the first and second on-off pairs of a cadence, respectively. (See Figure 5-1 for a graphical representation.) 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. OL-4804-01 Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator's Guide for H.323 (version 3.0) 5-43