Cisco Unified Communications Manager lets you integrate with many different voice messaging systems, including the Cisco Unity voice messaging system. Because you can integrate with a variety of systems, you must provide users with information about how to use your specific system.
You should provide this information to each user:
How to access the voice messaging system account. Make sure that you have used Cisco Unified Communications Manager to configure the Feature button on the Cisco Unified IP Phone.
Initial PIN for accessing the voice messaging system. Make sure that you have configured a default voice messaging system PIN for all users.
How the phone indicates that voice messages are waiting. Make sure that you have used Cisco Unified Communications Manager to set up a message waiting indicator (MWI) method.
For information using a voice messaging system, see the Cisco Unified SIP Phone 3905 User Guide for Cisco Unified Communications Manager.