You can convert pre-recorded audio files for use as mailbox names, greetings and announcements.
It can take up to 5 minutes before the system begins using a newly uploaded file.
In all cases, if the user records a new name, greeting or announcement from their phone, the pre-recorded file is deleted.
You can also use pre-recorded files for auto-attendant prompts. See Using pre-recorded names, greetings and announcements.
The source WAV file must have the following properties:
8KHz Mono
16-bit PCM Uncompressed
Unlike greetings recorded through the embedded voicemail interface, you cannot loop pre-recorded greetings.