Prerecorded Tones File; Voice Prompts File - AudioCodes Mediant 1000 User Manual

SIP User's Manual

23.1.2 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 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
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 AudioCodes'
BootP/TFTP utility or the Web interface (see 'Loading Auxiliary Files' on page 483).
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.

23.1.3 Voice Prompts File

The Voice Prompts (VP) file contains a set of voice prompts (or announcements) that can
be played by the device during operation. The voice announcements are prepared offline
using standard recording utilities and then combined into a single file using the DConvert
utility. The VP file can then be loaded to the device using the BootP/TFTP utility (refer to
the Product Reference Manual) or Web interface.
The VP file is a collection of raw voice recordings and/or wav files. These recordings can
be prepared using standard utilities such as CoolEdit and Goldwave
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.
Version 6.4
The PRT are used only for generation of tones. Detection of tones is
performed according to the CPT file.
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) and combined into a single file using the
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23. Software Upgrade
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March 2012