There's no paging in CUCM, if you need 1:1 you could try the intercom feature.
1:many still required a 3rd party.
FYI if you need to check this kind of info it's always in the:
New and Changed Information for Cisco Unified Communications Manager Release XXXX
Or within the RNs for each version.
They both contain what has been added and what changes you can expect.
HTH
java
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www.cisco.com/go/pdihelpdesk
HTH
java
if this helps, please rate