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Mediant 2000 SIP User’s Manual 7. Configuration Files
Version 4.4 137 July 2005
7.2 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.
Note that the prerecorded tones are used only for generation of tones. Detection of tones is
performed according to the CPT file.
7.2.1 PRT File Format
The PRT dat file contains a set of prerecorded tones to be played by the Mediant 2000 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
TM
) and combined into a single file using the TrunkPack
Downloadable Conversion utility (refer to Section
G.1.4 on page 218).
The raw data files must be recorded with the following characteristics:
• Coders: G.711 A-law, G.711 µ-law or Linear PCM
• Rate: 8 kHz
• Resolution: 8-bit
• Channels: mono
The generated PRT file can then be loaded to the Mediant 2000 using the BootP/TFTP utility
(refer to Section
6.13 on page133) or via the Embedded Web Server (Section 5.11.2 on page 82).
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.
7.3 Voice Prompts File
Note: The Voice Prompts file is applicable only to the VXML application.
The voice announcement file contains a set of Voice Prompts to be played by the Mediant 2000
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 Mediant 2000 using the BootP/TFTP
utility (refer to Section
6.12.1 on page 132) or via the Embedded Web Server (Section 5.11.2 on
page 82).
If the size of the combined Voice Prompts file is less than 1 MB, it can permanently be stored in
flash memory. Larger files, up to 10 MB, are stored in RAM, and should be loaded again (using
BootP/TFTP utility) after the Mediant 2000 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.711µ-Law/A-Law/Linear.