Figure 28: Busy Tone Frequencies - Grandstream Networks UCM6 Series Manual
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- Service manual (47 pages) ,
- Manual (31 pages) ,
- Basic configuration manual (29 pages)
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The results are 329ms of ringing and 332 of silence, we will round them both to 330, hence the Cadence
duration is c=330/330.
Step 4: Measuring Busy Tone Frequencies
1. On Audacity tool bar, go to Analyze > Plot Spectrum.
2. Point the mouse cursor on the highest signal to show the Peak Value as shown in the below figure
example:
In this example we have only one frequency Peak, hence the Busy tone frequencies are f1=436Hz@-
20dB and f2=0Hz@–20dB. (We have rounded the attenuation value to -20dB).
Figure 28: Busy Tone Frequencies
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