12 · Troubleshooting
One user, one call. That is the scope of this tool.
Call Analytics shows the streams of a user’s call: jitter, loss, round-trip, and the client. Use it when one person suffered and the building did not. The Teams Communications Support Engineer role is the troubleshooting role people usually mean here. Check the current role article.
A building-wide problem hunted one user at a time will take a week. Switch tools when the scope changes.
Use Call Analytics for one user’s call. Use CQD when the building is the question.
Call Analytics is one call. I will not use it to explain a subnet.
If it fails: A site problem is debugged as twenty separate user tickets.
Which description of SIP ladder is accurate?
A time-ordered picture of requests and responses between client, proxy, SBC, and carrier, joined by Call-ID. Without the Call-ID you are looking at two different calls. Source: https://learn.microsoft.com/en-us/microsoftteams/direct-routing-plan accessed 2026-10-14.
A colleague reports: Two captures are compared and they are different calls. Where do you start?
Two captures are compared and they are different calls. Capture on the SBC, filter the Call-ID, and read the first non-success code. Source: https://learn.microsoft.com/en-us/microsoftteams/direct-routing-plan accessed 2026-10-14.
Which description of One hypothesis is accurate?
Change one thing, then collect the same evidence again. A reboot plus a dial-plan edit plus a firewall change teaches nothing. Voice bridges punish bundled changes. Source: https://learn.microsoft.com/en-us/microsoftteams/use-call-analytics-to-troubleshoot-poor-call-quality accessed 2026-10-14.
Around the call: compliance recording, workforce management, emergency location, analytics, CRM screen pop, and an agent with a human escape. Each one has its own failure.
A site problem is debugged as twenty separate user tickets.
Cisco CUBE is one of the SBC families named in this lab’s certification lesson. A certified release can be the Direct Routing SBC between Unified CM and Teams.
The tenant still needs a verified domain on the SBC FQDN, and the user still needs Teams Phone. The studio translator does not open a live AXL session. Confirm the current certified release before you build.
Teams Phone and Webex Calling are separate clouds. This lab does not describe a feature that registers a Webex Calling user into a Teams tenant.
A number move is usually a carrier port, a certified SBC, or a meetings interop product. Confirm before relying.
Unified CCE stays the ACD until you migrate it. Microsoft’s contact-center articles name Connect, Extend, and Unify. They do not name a UCCE connector in the notes this lab cites.
Voice into Teams is still Direct Routing or Operator Connect. The routing script stays on the contact-center product you bought. Confirm the vendor’s current model. Source: https://learn.microsoft.com/en-us/microsoftteams/teams-contact-center.
Copilot Studio, Azure Communication Services, and Graph are later tracks in this lab. Treat any uncited limit as confirm before relying.
Opened 2026-10. A row marked confirm did not open. Wikipedia is background. The Teams blog row is the community index.
