3Com VCX V7122 SIP, User Manual

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3Com VCX V7122/SIP VoIP Gateway User Manual
Using this configuration file, the user can create up to 16 different Call Progress Tones using
up to 15 different frequencies (in the range from 300 Hz through 2000 Hz). Each one of the
Call Progress Tones is specified by the following two parameters: the tone frequency (either
single or dual frequencies are supported) and the tone cadence. This is specified by two sets
of on/off periods, but you can discard the use of the first on/off cycle by setting the relevant
parameters to zero. When the tone is made up of a single frequency, the second frequency
field should be set to zero.
For a continuous tone (such as dial tone), only the First Signal On time should be specified.
In this case, the parameter specifies the detection period. For example, if it equals 300, then
the tone is detected after 3 seconds (300 x 10 ms).
When defining several continuous tones, the First Signal On Time parameter
should have the same value for all tones.
The tones frequency should differ by at least 40 Hz from one tone to other defined
tones
.
Default Template for Call Progress Tones
The VCX V7122/SIP Gateway is initialized with the default Call Progress Tones configuration
template shown in
Table 20 . To change one of the tones, edit the default call progress.txt
file.
For example, to change the dial tone to 440 Hz only, replace the #Dial tone section in
Table 20 with the following text:
#Dial tone
[CALL PROGRESS TONE #1]
Tone Type=1
Low Freq [Hz]=440
High Freq [Hz]=0
Low Freq Level [-dBm]=10 (-10dBm)
High Freq Level [-dBm]=32 (use 32 if only single tone is required)
First Signal On Time [10msec]=300; The dial tone is detected after 3 sec
First Signal Off Time [10msec]=0
Second Signal On Time [10msec]=0
Second Signal Off Time [10msec]=0
You can specify several tones of the same type using Tone Type definition. These additional
tones are used only for tone detection. Generation of specific tone is according to the first
definition of the specific tone. For example, You can define an additional dial tone by
appending the second dial tone definition lines to the tone INI file. The VCX V7122/SIP
Gateway reports dial tone detection if either of the two tones is detected.