Your customer is opening a branch office housing 30 employees. It is beginning to implement IP Phones and plans on deploying a centralized Cisco CallManager cluster. Which two Cisco products should be deployed at the branch office to support IP Phones immediately while allowing migration to the centralized cluster when it is available? (Choose two.)

A.
CSA

B.
CME

C.
CUE

D.
IPS

E.
SRST