2.5.7 Download the Address Book
This use case, illustrated in the following diagram, describes how the address book is downloaded or refreshed on the protocol client.
Figure 11: Steps for downloading the address book
The protocol server creates both full and delta address book files, as described in [MS-ABS] and normalizes user phone numbers.
The protocol client downloads a copy of the address book by using the ABS URL that it received through in-band provisioning during client bootstrap to download the address book files.
The protocol client refreshes the local copy of the address book by using the address book server URL that it received through in-band provisioning during client bootstrap to download the address book delta files.
The protocol client has downloaded the address book files, which can then be used by the protocol client for search and reverse number lookup (RNL) for inbound calls.