Example: 30.234
This example means:
● Tone playback terminates after 30.234 seconds
Tone Field-3 to Field-6 Composition
Field - 3/4/5/6 share the same definition, and each field describes one single cadence segment.
Together, the four fields form a macro-segment, which is repeated until tone playback expires.
The expression is a string of numeric values with the special notation '/', '(', ')' and ','.
Its format is: t(f_0/on_0+off_0,f_1/on_1+off_1,f_2/on_2+off_2,f_3/on_3+off_3)
● t: the cadence segment duration in seconds
– Negative value: tone plays indefinitely
– No value: tone plays indefinitely
– Zero value: the duration of this particular segment is zero
– Positive value: Normal playback duration
● f_0/1/2/3: a digit to describe which frequency component(s) are used for the synthesis, and
can be one of following 8 options (0 through 7)
– 0: No frequency specified (silent tone)
– 1: The first frequency
– 2: The second frequency
– 3: The first and second frequencies
– 4: The third frequency
– 5: The first and third frequencies
– 6: The second and third frequencies
– 7: The first and second frequencies if two or more than two frequency components, or the first
frequency if only one frequency component is available.
If no value is provided for f_0/1/2/3, it automatically uses the combination of the first one
or two available frequency components.
● on_0/1/2/3: the tone active time in seconds
– Negative value: Not allowed
– No value: infinite tone active time
– Others: normal tone active time (as many as 3 decimated digits)
● off_0/1/2/3: the tone inactive time in seconds
– Negative value: Not allowed
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Chapter 14Appendix A
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