Call the voice mail, usually intercom 165.
Enter #6 * and the mailbox number.
I'm only posting this because it's readily available in the users manual.
Passwords are highly recomended on all mailboxes. [Linked Image from sundance-communications.com]

If it's a version 4 or higher you can have a message waiting light on your set for other mailboxes.

[This message has been edited by MrGemini (edited August 13, 2004).]