14 · Coexistence and CCaaS
Most Teams migrations in a Cisco estate are a dual-run, not a weekend miracle.
A calling search space is closest to a voice routing policy’s ordered usages, and it is not a one-to-one object. A translation pattern is closest to a dial-plan rule. A route pattern is closest to a voice route. There is no partition object in Teams. Pick one system to normalize numbers.
Calls from people still on CUCM to people now on Teams trombone through CUBE. That is normal during dual-running and expensive as a steady state. Move groups that call each other in the same wave. Keep the old route until rollback is boring.
Translate CUCM ideas carefully, normalize in one place, and keep the old route until the new path is quiet.
One normalization owner. Tromboning is temporary. Rollback keeps the old trunk.
If it fails: Both systems add +44, or the old trunk is deleted on Friday.
Which description of Teams Phone extensibility is accurate?
A way for a contact center, including Dynamics 365 Contact Center, to use a customer’s existing Teams Phone for the agent’s telephony. It is not a second carrier hidden in the app. Source: https://learn.microsoft.com/en-us/azure/communication-services/concepts/interop/tpe/teams-phone-extensibility-overview accessed 2026-10-14.
A colleague reports: Two phone systems ring the same person. Where do you start?
Two phone systems ring the same person. Use a solution that has finished the certification if you want the supported experience. The API existing is not the same as a finished certification. Source: https://learn.microsoft.com/en-us/azure/communication-services/concepts/interop/tpe/teams-phone-extensibility-overview accessed 2026-10-14.
Which description of CUBE as a bridge is accurate?
Cisco Unified Border Element can be the certified SBC between Teams and CUCM or a carrier. The IOS-XE release you run has its own guide. This campus does not paste a production dial-peer. Source: https://www.cisco.com/c/en/us/products/unified-communications/unified-border-element/index.html 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.
Both systems add +44, or the old trunk is deleted on Friday.
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.
