Prerecorded Tones (Prt) File; Prt File Format; Voice Prompts File - 3Com V7122 User Manual

Prerecorded Tones (PRT) File

The Call Progress Tones mechanism has several limitations, such as a limited number of
predefined tones and a limited number of frequency integrations in one tone. To work around
these limitations and provide tone generation capability that is more flexible, the 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.
The prerecorded tones are used only for generation of tones. Detection of tones
is performed according to the CPT file.

PRT File Format

The PRT dat file contains a set of prerecorded tones to be played by the gateway during
operation. Up to 40 tones (totaling approximately 10 minutes) can be stored in a single file in
flash memory. The prerecorded tones (raw data PCM or L8 files) are prepared offline using
standard recording utilities (such as CoolEdit
TrunkPack Downloadable Conversion utility (see
File).
The raw data files must be recorded with the following characteristics:
Coders:
Rate:
Resolution:
Channels:
The generated PRT file can then be loaded to the gateway using the BootP/TFTP utility (see
Configuration Files Parameters) or using the Embedded Web Server (see
The prerecorded tones are played repeatedly. This enables you to record only part of the
tone and play it 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.

Voice Prompts File

The voice announcement file contains a set of Voice Prompts to be played by the gateway
during operation. The voice announcements are prepared offline using standard recording
utilities and combined into a single file using the TrunkPack Downloadable Conversion Utility.
The generated announcement file can then be loaded to the gateway using the BootP/TFTP
utility (see Configuration Files
Files).
V7122 Gateway User Guide
TM
G.711 A-law, G.711 µ-law or Linear PCM
8 kHz
8-bit
mono
Parameters) or using the Embedded Web Server
) and combined into a single file using the
Creating a Loadable Prerecorded Tones
Auxiliary Files).
(Auxiliary
395