Which IP telephony component provides call processing, such as signaling, that in a traditional voice network is provided by switching equipment, such as a PBX?
A.
Advanced call-handling software, such as Cisco Unity
B.
Call-management hardware and software, such as Cisco CallManager
C.
Client-based software, such as CiscoSoftPhone
D.
Voice gateways, such as the Cisco VG248 Analog Phone Gateway