Refer to the exhibit.
Which description of the event captured in the SIP message on a Cisco Unified Communication Manager Express router with Cisco Unified Express and registered IP phones (SIP and SCCP)is true?
A. The Cisco UCM Express router notifies a SIP phone to turn on its MWI
B. Cisco Unified Express notifies the Cisco UCM Express router to turn on MWI for a sip IP phone
C. The Cisco UCM Express router hairpins SIP message to itself to notify an SCCP IP phone to turn on MWI
D. The Cisco UCM Express router notifies Cisco Unified Express that MWI has been turned on for a SIP phone
E. Cisco Unified Express notifies a SIP IP phone to turn on its MWI
Correct