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Question 75 - MS-721 discussion
You have a Microsoft Teams Phone deployment.
You have a PBX that connects to the PSTN by using an E1/T1 Primary Rate interface (PRI).
You plan to migrate to Direct Routing by using the existing PSTN services.
What should you install upstream of the PBX?
A.
a physical Session Border Controller (SBC)
B.
an FXO SIP Analog Telephony Adapter (ATA)
C.
a virtual Session Border Controller (SBC)
D.
a Session Border Controller (SBC) in Azure
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