Device Settings
Polycom, Inc.
22
The frequency expression is a string of numeric values with the notation '+' or '
–
'. The numeric values are
the frequency's decimal values in Hz and amplitude in dBm (maximum 3 dBm). Different frequencies are
separated by a comma.
Example:
350
–
18,440
–
18,550+2
This example means:
●
The first frequency at 350 Hz with strength at
–
18 dBm
●
The second frequency at 440 Hz with strength at
–
18 dBm
●
The third frequency at 550 Hz with strength at +2 dBm
Field-2 Composition
This field describes the overall tone playback duration in seconds.
The expression is a numeric value, and supports as many as 3 decimated digits. The numeric value can
negative, zero, positive, or skipped:
●
Negative value: tone plays indefinitely
●
Zero value: tone playback is skipped
●
Positive value: Normal playback duration
●
No value: tone plays indefinitely
Example:
30.234
This example means:
●
Tone playback terminates after 30.234 seconds
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
