What is the purpose of using device pools?

A.
to provide an easily modified set of system parameters for the Cisco Unified CallManager
server and endpoints

B.
to provide all the IP phone parameters required for auto-registration

C.
to consolidate the dial plan for a set of IP phones in the same location

D.
to provide a convenient way to define a set of common characteristics that can be assigned to
devices

Explanation:
device pool definition –
Device pools define sets of common characteristics for devices, the device pool structure supports
the separation of user and location information. The device pool contains only device- and
location-related information