Which two of these are good indicators that a business may benefit from a Cisco IP telephony solution? (Choose two.)
A.
The business wants to maintain interoperability with a single-vendor network
B.
The business wants to protect its investment in existing PBX hardware.
C.
The business wants to extend the capabilities of its network to branch offices and remote employees
D.
The business wants to limit the number of separate networks by having both data and voice on a single network