To be compatible with the gateway v VAL source and Communication Manager, announcement recordings must have the following parameters:
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CCITT A-Law or CCITT μ-Law compression format. Do not use PCM.
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8-KHz sample rate
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8-bit resolution (bits per sample)
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Mono (channels = 1)
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The μ-Law compression format is used in the United States, and A-Law compression format is used internationally. Use the compression format that is specified on the Location Parameters screen.
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Filenames for the VAL announcement sources cannot contain blank spaces, nor any of the following characters:
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Period (.)
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Comma (,)
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Colon (:)
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Asterisk (*)
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Question mark (?)
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Less than (<)
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Greater than (>)
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Forward slash (/)
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Backward slash (\)
The filename itself is case sensitive, but the file extension .wav must be lowercase. Announcements that are recorded in this format occupy 8-KB per second of file space for each second of recorded speech. For example, a 10-second announcement creates an 80-KB .wav file.
Do not type the .wav file extension for the file name in the Announcements/Audio Sources screen. The system does not display the .wav file extension on this screen.
