Because the Policy and Charging Application is required to run on a 3-tier OAM topology where some data is mastered at the NOAM and some data is mastered at SOAMs at each site, backup and restore must be performed on the NOAM and on the SOAMs at each site.
Only configured data is backed up and restored. Dynamic data such as policy and policy charging sessions and policy bindings that is mastered on SBR MP servers is not backed up or restored.
The PCA feature uses the capabilities of the Backup and Restore functions provided by the OAM Status & Manage >Database GUI page, as described in the "Database Backups and Restores" chapter of the DSR Administration Guide.