Customizes the tone for each condition.
This parameter is only applicable when the
tone type is configured to Custom.
The value format is F/D.
F: the frequency of the tone (ranges from 200
to 7000 Hz). When 0 is used to define the
frequency, it means a pause between tones. A
tone can be composited at most four different
frequencies (value format: F1+F2+F3+F4).
D: the time duration (in milliseconds, ranges
from 0 to 30000ms) of ringing the tone.
You can configure at most eight different tones
for one condition, each tone separated by
comma (e.g. 250/200, 0/1000, 200+300/500,
600+700+800+1000/2000).
voice.tone.dial = 800+200/1000, 0/100,
500/1200, 500+600+950+1500/5000