Installation & Operation Manual 430 Document # LTRT-92224
Mediant 8000
37.3 Pre-Recorded Tones (PRT) Files
The Call Progress Tones (CPT) files have several limitations, such as the limited
number of predefined tones, or limited number of frequency integrations in one tone.
To solve this situation and provide a more flexible tone generation capability, Pre-
Recorded Tones (PRT) files can be used.
The Pre-Recorded Tones (PRT) file consists of one or more PCM (WAV) file with the
following characteristics:
Table
37-3: Pre-Recorded Tones (PRT) file Characteristics
Characteristic Description
Coder
G.711 A-law, G.711 µ-law or Linear PCM
Rate 8 kHz
Resolution 8-bit
Channels mono
The PRT files are played repeatedly (in auto-rewind mode). This allows recording only
part of the tone, while still playing 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 the
6 seconds of the cadence. The PRT module repeatedly plays this cadence for the
configured duration. Similarly, a continuous tone can be played by repeating only a
part of it.
Pre-Recorded Tones (PRT) files must be created using DConvert utility (as
described in 'Creating a Pre-Recorder Tones File' on page 431).
To associate a Pre-Recorded Tones (PRT) file with a Media Gateway board:
1. Click
to access the Media Gateway status screen.
2. Select the desired Media Gateway Gateway board.
3. In the Navigation pane, select Inventory and then in the configuration pane, click
Inventory Settings; the Inventory Settings screen is displayed.
4. In the Setup Files tab, configure the Prerecorded Tones File parameter to
match the desired PRT file.
To Next Page
Loading...
