For users, the mailbox is automatically used to answer calls direct to the user that ring unanswered for the user's configured No Answer Time. The mailbox is also used in other situations where the system would have otherwise returned a busy tone, for example when the user is set to Do Not Disturb.

For hunt groups, the mailbox is used when a call has rung for the group's Group No Answer Time and the Group No Answer Destination is set to Voicemail.

For security, a voicemail access code can be assigned to any mailbox. This can be changed by the mailbox user or the system administrator.

For user mailboxes, message waiting indication is provided to the user's phone extension and to their user application.

For hunt group mailboxes, message waiting indication can be assigned to specified users.

Various dialing short codes can be used to control voicemail features and for actions such as collecting messages, leaving messages, and turning voicemail on and off. See Default short codes for more information.