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A negative dBm level can be offset by ipbx_tone_gain. Allowed values for freq are from 0 to
3000Hz. Allowed values for db levels are from –1 to –40 dB.
tone_on_timeX and tone_off_timeX are interleaved Tone On and Tone Off durations in msec. A
value of zero for a Tone On time indicates a continuous tone. A value of zero for a Tone Off time
produces silence, while a negative value (-1) terminates the tone pattern, removing the silencing.
(With silencing, the voice channel is blocked until the tone pattern is stopped.) The maximum
number of tones is four. The maximum number of on-to-off and off-to-on times counted individually
is nine.
For example, the default setting for initial North American dial tone is:
{2, 0, 0, {350, -19, 440, -19}, {0}}
where:
2 is the number of frequency/dB pairs (350, -19, and 440, -19)
The first 0 is the number of on/off transitions in the tone pattern, in this case a constant tone.
The second 0 indicates that the tone will be played until otherwise instructed.
The first pair of frequency/dB (350, -19) specifies that the first tone is at 350Hz with a level of -19dB.
The second pair of frequency/dB (440, -19) specifies that the second tone is at 440Hz with a level of
-19dB.
The final {0} specifies that there are no on/off times and that the tone is constant.
Call Progress Tone Parameters
Parameter Description Default (North America)
Initial Dial Tone
The default tone used when a person
begins any dialing operation
2 0 0 350 -19 440 -19
Alternate Dial Tone
The alternate tone used when a
person begins any dialing operation
1 0 0 400 -16
Secondary Dial Tone
The tone used in cases where a
person can dial a number to access a
designated type of line
2 0 0 420 -19 520 -19
Stutter Dial Tone
Indicates a message waiting
2 7 0 350 -19 440 -19 100
110 100 110 100 110 0
Message Waiting Dial Tone
Indicates a message waiting
2 2 0 350 -19 440 -19 160
160
Call Forward Dial Tone
Indicates that calls are being
forwarded
2 3 0 350 -19 440 -19 250
400 0
Pre-Ringback Tone
Played while a call is being signaled
before a confirmation is received from
the SIP server
0 0 0 (Silence)
Ringback Tone
Played while a call is connecting
2 2 0 440 -19 480 -19 2000
4000
Call Waiting Tone Default
Played when an incoming call arrives
and the phone is in use
1 2 0 440 -16 300 9700
PSTN Call Waiting Tone Default
Played when a call is on hold longer
than the timeout hold duration
1 2 0 440 -16 300 9700
Chapter 7: Regionalization 25