The Cisco Unified Contact Center Enterprise solution supports SIP-based trunks and services for
inbound calls. In a SIP trunk deployment, which statement is true?

A.
All inbound SIP calls must be delivered as G.711 with no compression.

B.
Cisco requires the Cisco Unified Border Element to act as a Session Border Controller between
the carrier SIP trunk and the customer voice network.

C.
Cisco Unified IP IVR requires additional MTP resources in a SIP deployment.

D.
Cisco Unified IP phones must use the SIP protocol, not SCCP, when used with SIP trunk
services.