How to Validate Voice Features for a Direct Routing SBC?

MS-721 By islever Editorial Last updated

Configure and manage Direct Routing for Teams Phone

Short answer

C Use the SIP Tester client script to validate voice features for calls traversing the SBC.

Question

You have a Microsoft Teams Phone deployment that uses Direct Routing.
You connect a new Session Border Controller (SBC).
You need to verify that all the voice features work as expected for calls that traverse the SBC.
What should you use?
  1. Microsoft Remote Connectivity Analyzer
  2. Microsoft 365 network connectivity test tool
  3. the SIP Tester client script Correct Answer
  4. Microsoft Teams Network Assessment Tool

Key Takeaways

The question tests the appropriate tool for validating Direct Routing SBC voice features, where the common trap is confusing network assessment tools with functional SIP testing scripts.

The SIP Tester client script is the designated tool for validating Direct Routing voice features on a newly connected Session Border Controller (SBC). This page confirms it tests call scenarios like simultaneous ring and consultative transfers.

Common mistake: Choosing the Microsoft Teams Network Assessment Tool (D) because it sounds like a testing tool, but it only measures network quality, not SBC functional voice features.

Expert Analysis

Why the Answer Is Correct

The SIP Tester client script (Option C) is specifically designed to validate Direct747 Routing configurations on an SBC by simulating real call scenarios. It tests critical voice features such as outbound and inbound calls, simultaneous ring, media escalation, and consultative transfer. This directly fulfills the requirement to verify that all voice features work as expected for calls traversing the new SBC.

Why the Other Options Are Wrong

Option A, the Microsoft Remote Connectivity Analyzer, is used to test mail flow and client connectivity, not Teams Phone Direct Routing voice features. Option B, the Microsoft 365 network connectivity test tool, evaluates network) network routing and connectivity to Microsoft 365 service front doors, not SBC call functionality. Option D, the Microsoft Teams Network Assessment Tool, measures network quality metrics like bandwidth, jitter, and packet loss, but does=not test SIP signaling or call routing features on an SBC.

Community Comment Notes

As VSARAVAN noted, the script "submits an SIP test to the test runner" and allows testing of scenarios including "Outbound and inbound calls". This confirms the SIP Tester script is the correct tool for validating functional voice features on the SBC.

Official Reference

https://learn.microsoft.com/en-us/microsoftteams/sip-tester-powershell-script

This link opens the official vendor documentation in a new tab.

Exam Strategy

When asked to validate SBC functionality for Direct Routing, look for the SIP Tester script. Distinguish functional testing (SIP Tester) from network quality testing (Network Assessment Tool) and general connectivity checks (Remote Connectivity Analyzer).

Discussion 2 contributions

Compiled from public community threads and reader submissions, lightly edited for clarity. Handles and vote tallies are shown as recorded, and comments reflect the views of individual contributors.

From public community threads 2

  1. VSARAVAN 👍 5 Answered C
    The script submits an SIP test to the test runner, waits for the result, and then presents it in a human-readable format. You can use this script to test the following scenarios: Outbound and inbound calls Simultaneous ring Media escalation Consultative transfer https://learn.microsoft.com/en-us/microsoftteams/sip-tester-powershell-script
  2. BhaiKyare 👍 1 Answered D
    We want to test the MS team

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