Refer to the exhibit.
Which two statements about SIP trunk are true? (Choose two.)

A.
A SIP trunk configuration is always needed for a UC500 device.

B.
A SIP trunk is needed only to provide internet access for your data users.

C.
SIP trunk configuration parameters should be provided to your service provider.

D.
A SIP trunk is needed only if you are using voice mail to supply the Message Waiting Indicator
value to the Cisco Unity Express module.

E.
A SIP trunk is needed only for voice if you are planning on using VoIP through a service
provider.

F.
A SIP trunk is not supported in akeyswitch configuration.