Which three of the following tasks must be completed in a partially automated setup for phones to be able to register with CallManager Express? (Choose three. )
A.
Enable downloading of the firmware of each phone type, using the tftp-server command.
B.
Associate each phone type with a firmware file, using the load command.
C.
Configure an ephone for each phone that will be registering with CallManager Express.
D.
Configure the maximum number of ephones the CallManager Express will support.
E.
Configure the keepalive timer.
F.
Configure the dial plan-pattern to associate extensions with fully qualified E.164 numbers.