Which call processing agent is based on Cisco IOS software and works with ISR platforms?

A.
Cisco Unified Presence Server

B.
Cisco Unity Connection

C.
Cisco Unified Communications Manager Express

D.
Cisco Unified Communications Manager

E.
Cisco Unified Contact Center Express

Explanation:
Cisco unified presence server, unity connection, communication manager and
contact center express requires appliance based system based on Cisco media convergence
server (MCS), UCS (unified computing system) or VMware.