Which of the features below does a B2BUA deliver to a SIP-based VoIP architecture? (Choose 3 answers)
A. centralized call management
B. SIP-based VoIP interworking between LAN and WAN
C. management and monitoring of the entire call state
D. Provide conversion of TDM to DIP
E. connect legacy phones
Which of the features below does a B2BUA deliver to a SIP-based VoIP architecture? (Choose 3 answers)
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Which of the features below does a B2BUA deliver to a SIP-based VoIP architecture? (Choose 3 answers)
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