IP phone users on your network report hearing echoes of their own voices during calls.
Which three actions correct the problem?

A.	adjust padding & receive levels
B.	confirm that the users turn off their headsets when their phones are in speaker mode
C.	verify that the most recent software versions are in use and the latest patches are applied
D.	install a new motherboard in Cisco IOS Router
E.	Bind media to the switch port instead of the incoming dial peer
F.	remove the bearer capability for voice traffic