Which two features require or may require configuring a SIP trunk? (Choose two.)
A.
SIP gateway
B.
Call Control Discovery between a Cisco Unified Communications Manager and Cisco Unified Communications Manager Express
C.
Cisco Device Mobility
D.
Cisco Unified Mobility
E.
registering a SIP phone
Explanation:
– Trunk Types Used by Special Applications
Call Control Discovery:
– Special trunks configured in Cisco Unified Communications Manager clusters that refer to an SAFenabled network providing Call Control Discovery features.CCD between CCM and CUCM Express SAF-CCD requires a SIP Trunk or H.323