On the Cisco IP Phone SPA525G, dial *97 to access the voicemail. The options are:
2 Change folder
0 New messages
1 Old messages
2 Work messages
3 Family messages
4 Friends messages
# Cancel
3 Advanced options
5 Leave a message
1 Enter an extension
2 Use the directory
* Return to main menu
* Return to main menu
The option 3 → 5 → 1 is particularly interesting to leave a message when you don't want to receiver's phone to ring.