Core Issue
XML files, such as the Corporate Directory, Services, and Extension Mobility, are not accessible on the Cisco CallManager from these IP Phones:
When Services and Corporate Directory are chosen, after the successful login to the Cisco CallManager User page, the page gets stuck in the Requesting mode.
Resolution
This issue is documented in Cisco bug ID CSCsf98288. It is observed on IP Phones that have Web Access disabled on the Cisco CallManager Administration page and that run this firmware:
· 8.0(3)
· 8.0(4)
One possible workaround for this issue is to enable Web Access, either from the IP Phones or from the CallManager Administration page. In order to enable Web Access from the IP Phones, choose Setting > Network Configuration > Web Access and enable it. In order to enable it from the Cisco CallManager, choose Administration Page > Device > Phone, choose the phone and enable Web Access from the Product Specific Configuration. In order to resolve this issue, the firmware of the IP Phone can be upgraded as mentioned in the First Fixed-in Version section of Cisco bug ID CSCsf98288.
Refer to these documents for more information: