Which three options correctly describe the role of a subsequent node in a Cisco Unified CallManager 5.0 cluster? (Choose three.)
A.
replicates the database to other Cisco Unified CallManager servers
B.
maintains read-only copies of the configuration database
C.
processes IP telephony calls
D.
collects CDRs
E.
can have only one in a Cisco Unified CallManager cluster
F.
maintains writeable copy of the configuration database