You have a Microsoft Teams Phone deployment. You are deploying a new remote site. You have a Session Border Controller (SBC) that has an E1/T1 Primary Rate Interface (PRI) deployed to the remote site.

The correct answer is B. Microsoft Skype for Business 3PIP phones. A Survivable Branch Appliance (SBA) provides local PSTN call continuity when the WAN link to Microsoft 365 is unavailable. SBAs support Skype for Business 3PIP (Third-Party IP) phones because these devices communicate via SIP directly with the SBC/SBA infrastructure at the branch

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Question

You have a Microsoft Teams Phone deployment. You are deploying a new remote site. You have a Session Border Controller (SBC) that has an E1/T1 Primary Rate Interface (PRI) deployed to the remote site. You plan to deploy a Survivable Branch Appliance (SBA) to ensure PSTN connectivity. Which type of endpoints are supported by the SBA?

Options

AMicrosoft Teams macOS desktops
BMicrosoft Skype for Business 3PIP phones
Ccall queues in Microsoft Teams
Dauto attendants in Microsoft Teams

How the community answered

(44 responses)

A
2% (1)
B
89% (39)
C
7% (3)
D
2% (1)

Explanation

A Survivable Branch Appliance (SBA) provides local PSTN call continuity when the WAN link to Microsoft 365 is unavailable. SBAs support Skype for Business 3PIP (Third-Party IP) phones because these devices communicate via SIP directly with the SBC/SBA infrastructure at the branch, allowing calls to traverse the E1/T1 PRI even without cloud connectivity. Microsoft Teams macOS desktops (A) require Teams cloud services to authenticate and place calls, so they cannot function through an SBA alone. Call queues (C) and auto attendants (D) are cloud-hosted services that are unavailable when the WAN is down, making them incompatible with SBA survivability.

Topics

#Survivable Branch Appliance#Direct Routing#PSTN Fallback#3PIP Phones

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