
Version 5.6 311 November 2008
SIP User's Manual 6. Auxiliary Configuration Files
6.2.1 Examples of Ringing Signals
Below is an example of a ringing burst:
#Three ringing bursts followed by repeated ringing of 1 sec on and
3 sec off.
[NUMBER OF DISTINCTIVE RINGING PATTERNS]
Number of Ringing Patterns=1
[Ringing Pattern #0]
Ring Type=0
Freq [Hz]=25
First Burst Ring On Time [10msec]=30
First Burst Ring Off Time [10msec]=30
Second Burst Ring On Time [10msec]=30
Second Burst Ring Off Time [10msec]=30
Third Burst Ring On Time [10msec]=30
Third Burst Ring Off Time [10msec]=30
Fourth Ring On Time [10msec]=100
Fourth Ring Off Time [10msec]=300
Below is an example of various ringing signals:
[NUMBER OF DISTINCTIVE RINGING PATTERNS]
Number of Ringing Patterns=3
#Regular North American Ringing Pattern
[Ringing Pattern #0]
Ring Type=0
Freq [Hz]=20
First Ring On Time [10msec]=200
First Ring Off Time [10msec]=400
#GR-506-CORE Ringing Pattern 1
[Ringing Pattern #1]
Ring Type=1
Freq [Hz]=20
First Ring On Time [10msec]=200
First Ring Off Time [10msec]=400
#GR-506-CORE Ringing Pattern 2
[Ringing Pattern #2]
Ring Type=2
Freq [Hz]=20
First Ring On Time [10msec]=80
First Ring Off Time [10msec]=40
Second Ring On Time [10msec]=80
Second Ring Off Time [10msec]=400
6.3 Prerecorded Tones (PRT) File
The Call Progress Tones (CPT) mechanism has several limitations such as a limited
number of predefined tones and a limited number of frequency integrations in one tone. To
overcome these limitations and provide tone generation capability that is more flexible, the
Prerecorded Tones (PRT) file can be used. If a specific prerecorded tone exists in the PRT
file, it takes precedence over the same tone that exists in the CPT file and is played instead
of it.
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