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 a keyswitch configuration.
Answer: E F
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