Highland Properties is deploying Cisco VT Advantage to enable executives to participate in video calls with customers and suppliers. Which two devices can be used to allow these external calls to be placed over a dedicated PRI? (Choose two.)

A.
Cisco IPVC 3521

B.
Cisco IPVC 3526

C.
Cisco IPVC 3540

D.
Cisco Multiservice IP-to-IP Gateway

E.
Cisc MCM proxy