Voicemail features?

I am trying to ascertain if Asterisk already supports these features, or if development is required. We are running a 1.4 implementation at the moment on a nationwide scale.

  1. What version allows the user’s mailbox to be time stamped in their local time zone?

  2. What version allows supervisors to access employee mailboxes?

  3. What version would allow the employee to change their VM password from within the mailbox?

If you can point me in the right direction I would appreciate it!