What is the function of Cisco Unified CallManager Regions?

A.
to assign directory numbers to devices as they connect to the IP telephony network

B.
to implement call admission control in a centralized call processing deployment

C.
to provide alternate call routing when the primary call path is unavailable

D.
to specify the codec used for audio and video calls

E.
to define the time zones for devices connected to Cisco Unified CallManager

Explanation:

Region settings specify voice codec that can be used for calls within a region and between regions. Available codecs are: G.723, G.729, G722, GSM, G.728, G.711 and Wideband.