Frequently Asked Question - Where is the pre-recorded voice prompts?
Where is the pre-recorded voice prompts?
The location is in /mnt/mmc/asterisk/voicemail/default/<extension number>/
The unavailable message should be named as unavail.wav and the busy message should be named as busy.wav.
The audio file format must be WAV format in 16-Bit PCM encoded, 8 KHz and mono.