Core Issue
This occurs when Cisco CallManager 3.2(3) is connected to an Cisco IP Phone 7940. The Personal Address Book has been installed, but it is unable to access the program. The Domain Name System (DNS) is not the issue because name resolution is working properly.
Resolution
To resolve this issue, restart the web service on which the Personal Address Book service is hosted.
To address problems with the Personal Address Book and Personal Fast Dials, refer to Troubleshooting Personal Directory with Cisco CallManager 3.x and 4.x.
For more information, refer to these documents: