Version 6.2 399 February 2011
SIP User's Manual 7. Auxiliary Configuration Files
7.2 Prerecorded Tones File
The CPT file 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.
Note: The PRT are used only for generation of tones. Detection of tones is
performed according to the CPT file.
The PRT is a *.dat file containing a set of prerecorded tones that can be played by the
device. Up to 40 tones (totaling approximately 10 minutes) can be stored in a single PRT
file on the device's flash memory. The prerecorded tones are prepared offline using
standard recording utilities (such as CoolEdit
TM
) and combined into a single file using the
DConvert utility (refer to the Product Reference Manual).
The raw data files must be recorded with the following characteristics:
Coders: G.711 A-law or G.711 µ-law
Rate: 8 kHz
Resolution: 8-bit
Channels: mono
Once created, the PRT file can then be loaded to the device using the Web interface (see
''Loading Auxiliary Files'' on page 337).
The prerecorded tones are played repeatedly. This allows you to record only part of the
tone and then play the tone for the full duration. For example, if a tone has a cadence of 2
seconds on and 4 seconds off, the recorded file should contain only these 6 seconds. The
PRT module repeatedly plays this cadence for the configured duration. Similarly, a
continuous tone can be played by repeating only part of it.
7.3 CAS Files
The CAS auxiliary files contain the CAS Protocol definitions that are used for CAS-
terminated trunks. You can use the supplied files or construct your own files. Up to eight
files can be loaded to the device. Different files can be assigned to different trunks
(CASTableIndex_x) and different CAS tables can be assigned to different B-channels
(CASChannelIndex).
The CAS files can be loaded to the device using the Web interface or ini file (see ''Loading
Auxiliary Files'' on page 337).
Note: All CAS files loaded together must belong to the same Trunk Type (i.e., either
E1 or T1).
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