Voice Prompts File - AudioCodes E-SBC User Manual

CHAPTER 44 Loading Auxiliary Files
The PRT file can include prerecorded audio tones of different coders (e.g., some with G.711 and
some with G.729). 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 device
repeatedly plays this cadence for the configured duration. Similarly, a continuous tone can be
played by repeating only part of it.
The following figure shows an example of the creation of the PRT file containing multiple user-
defined tones ("acUserDefineTone<Index>") through the DConvert utility:

Voice Prompts File

The Voice Prompts (VP) file contains a set of voice prompts (or announcements) and/or .wav files
that can be played by the device. The voice announcements are prepared offline using standard,
third-party recording utilities and then combined into a single file using AudioCodes DConvert
utility. The VP file can then be loaded to the device using the Web interface.
The raw data files must be recorded with the following characteristics:
■ Coders: Linear G.711 A-law or G.711 µ-law
■ Rate: 8000 kHz
■ Resolution: 8-bit
■ Channels: mono
When the list of recorded files is converted to a single voiceprompts.dat file, every Voice Prompt is
tagged with an ID number, starting with '1'. This ID is later used by the device to play the correct
announcement. Up to 1,000 Voice Prompts can be defined. If the size of the combined VP file is
less than 1 MB, it can be permanently stored on flash memory. Larger files (up to 10 MB) are stored
in RAM and should be loaded again after the device is reset.
The device can be provided with a professionally recorded English (U.S.) VP file.
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To generate and load the VP file:
1. Prepare one or more voice files using standard utilities.
2. Use the DConvert utility to generate the voiceprompts.dat file from the pre-recorded voice
messages. For more information, refer to DConvert Utility User's Guide.
3. Load the voiceprompts.dat file to the device using the Web interface (see
Files).
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Loading Auxiliary