Up to 10 phone calls over a 1 Mb/s WAN link have had consistently acceptable audio quality, even
with considerable data traffic. Recently, when over 10 calls are made, audio quality has declined.
Which solution would you implement to maintain acceptable audio quality for the first 10 calls only
while allowing for changes in WAN data utilization?

A.
Cisco Unified Communications Manager CAC

B.
RSVP CAC on the routers integrated with Cisco Unified Communications Manager

C.
CAC implemented directly on the Cisco IP Phones

D.
RSVP CAC operating on the routers independently of Cisco Unified Communications Manager