Which of the following features are offered by Cisco CallManager Groups? (Choose all that apply.)

A.
Redundancy

B.
Centralized Call Processing

C.
Isolated Call Processing

D.
Distributed Call Processing

E.
Transcoding

F.
Conferencing

Explanation:
Cisco CallManager Group
Use Cisco CallManager groups to specify which Cisco CallManager controls which devices on your network. Cisco CallManager groups provide two important features for your system:
Distributed call processing-This feature enables you to distribute the control of devices across multiple Cisco CallManagers. See the “Distributed Call Processing” section. Redundancy-This feature enables you to designate a primary and backup Cisco CallManagers for each group. See the “Redundancy” section.