Version 6.8 433 Mediant 2600 E-SBC
User's Manual 30. Software Upgrade
30.1.2 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.
Notes:
• The PRT file only generates (plays) tones; detection of tones is according to the
CPT file.
• Playing tones from the PRT file does not require DSP resources. For local
generation of tones, the device requires DSP resources. In addition, if DSPs are
being used in a current call (for whatever reason), only local tone generation is
supported (tone play from the PRT file is not supported).
• The PRT file supports only calls that use the G.711 coder.
• The PRT file supports only the ringback tone and hold tone.
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 third-party recording utilities and combined into a single file, using AudioCodes
DConvert utility (refer to the document, DConvert Utility User's Guide for more information).
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 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.
Once created, the PRT file must then be loaded to the device, using the Web interface (see
''Loading Auxiliary Files'' on page 429).
30.1.3 Dial Plan File
The Dial Plan file can be used for various digit mapping features, as described in this
section.
30.1.3.1 Creating a Dial Plan File
The Dial Plan file is a text-based file that can contain up to 8 Dial Plans (Dial Plan indices)
and up to 8,000 rules (lines). The general syntax rules for the Dial Plan file are as follows
(syntax specific to the feature is described in the respective section):
Each Dial Plan index must begin with a Dial Plan name enclosed in square brackets
"[...]" on a new line.
Each line under the Dial Plan index defines a rule.
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