Which four of these are used when planning capacity requirements for on-premises voice conferencing? (Choose four.)
Select 4 response(s).

A.
estimated external voice conferencing traffic percentage

B.
Cisco Unified Communications Manager and PBX deployment locations and size

C.
estimated internal voice conferencing traffic (WAN and LAN)

D.
estimated external and internal video traffic

E.
VoIP endpoint types

F.
fax machine endpoint types and locations