By default, your extension is a trusted location, which means that from your extension you can log into your voicemail mailbox without the need to enter an access code
Procedure
Dial *17. If this is the first time that the mailbox has been used, you might be prompted to record a name. If so, follow the instructions that you hear.
When you have logged in to your mailbox, an announcement tells you how many new messages you have (if any). New messages are then played back.
You can press 8 to find out about the options that you can use.
