AudioCodes Mediant 2000, User Manual

Page: 338 / 418

SIP User's Manual 338 Document #: LTRT-68808
Mediant 2000
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
AudioCodes' TrunkPack Downloadable Conversion 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
The generated PRT file can then be loaded to the device using AudioCodes' BootP/TFTP
utility or the Web interface (refer to ''Loading Auxiliary Files'' on page
231 ).
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.
6.3 Voice Prompts File
The voice announcement file contains a set of Voice Prompts that can be played by the
device
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 device
using the BootP/TFTP utility (refer to the
Product Reference Manual
).
If the size of the combined Voice Prompts file is less than 1 MB, it can permanently be
stored on flash memory. Larger files, up to 10 MB, are stored in RAM, and should be
loaded again (using BootP/TFTP utility) after the device is reset.
The Voice Prompts integrated file is a collection of raw voice recordings and / or
wav
files.
These recordings can be prepared using standard utilities such as CoolEdit, Goldwave TM
and others. The raw voice recordings must be sampled at 8000 kHz / mono / 8 bit. The
wav
files must be recorded with G.711
μ
-Law/A-Law/Linear.
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 used later by the device to
start playing the correct announcement. Up to 1,000 Voice Prompts can be used.
AudioCodes provides a professionally recorded English (U.S.) Voice Prompts file.
¾
To generate and load the Voice Prompts file, take these 3 steps:
1.
Prepare one or more voice files using standard utilities.
2.
Use the TrunkPack Downloadable Conversion Utility to generate the
voiceprompts.dat
file from the pre-recorded voice messages (refer to the
Product Reference Manual
).
3.
Load the
voiceprompts.dat
file to the device using TFTP (refer to the
Product
Reference Manual
) or Web interface (refer to ''Loading Auxiliary Files'' on page 231 ).