After you've created your mailbox, you need to route your DID to it.
From the DID Numbers menu, choose Manage DID(s).
Edit the DID of your choice.
Change Voice Mail to the mailbox you just created.
Set Dial Time Out in seconds to whatever you prefer for the ring delay.
As for the recorded message, there is a generic one, but you can record your own if you want. To do this, dial *97 to access your voicemail, and then press 0 for mailbox options.
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