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?

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?

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.
client-based software, such as Cisco SoftPhone

B.
voice gateways, such as the Cisco VG248 Analog Phone Gateway

C.
call-management hardware and software, such as Cisco CallManager

D.
advanced call-handling software, such as Cisco Unity



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