Teams Phone Mobile uses a certified mobile operator.The user’s SIM number is assigned as their Teams number.They need Teams Phone.They do not need a separate Calling Plan for that path.
Do not put the main queue on someone’s SIM.When that person leaves, the number leaves.CRM matching also fails if the same human presents two caller IDs.
Teams Phone Mobile is for people with a SIM, not for the company’s main queue.
Two paths for Teams Phone Mobile. RTP may skip the processor. SIP does not.Qualitative fit, not a survey. Counts in this drawing are teaching order, not customers.
A colleague reports: A mobile user matches a Direct Routing route and hairpins. Where do you start?
A mobile user matches a Direct Routing route and hairpins. Give each population a policy that matches its carrier. Source: https://learn.microsoft.com/en-us/microsoftteams/direct-routing-plan accessed 2026-10-14.
Which description of SIP proxies is accurate?
For commercial Microsoft 365, signal to sip.pstnhub.microsoft.com, then sip2, then sip3, on TCP 5061. GCC High and DoD use different names. DNS can return one address. The firewall must allow the published ranges, not that one answer. Source: https://learn.microsoft.com/en-us/microsoftteams/direct-routing-plan accessed 2026-10-14.
A colleague reports: A lockdown allows only today’s DNS answer and the trunk fails next week. Where do you start?
A lockdown allows only today’s DNS answer and the trunk fails next week. Checked 15 October 2026. Direct Routing SBC signaling and media on the plan page: 52.112.0.0/14 and 52.120.0.0/14. Teams client optimize on the Office 365 URLs page and the worldwide endpoints feed: 52.112.0.0/14 and 52.122.0.0/15. Those lists are not interchangeable. Source: https://learn.microsoft.com/en-us/microsoftteams/direct-routing-plan accessed 2026-10-14.
Operator Connect A certified carrier manages PSTN for you inside the tenant. You need Teams Phone. You do not need a Microsoft Calling Plan or your own SBC. Config: Enable the operator in the admin center and assign the numbers they provide. Fault: Someone also builds a Direct Routing SBC for the same numbers and the routes fight.
Operator Connect for India The India-specific operator model. It exists because India PSTN rules are not the same as a generic Operator Connect deployment. Config: Use the current India plan article and the licensed operator there. Fault: A UK SBC was proposed as the egress for an India office.
Teams Phone Mobile The user’s mobile SIM number is also their Teams number, through a certified mobile operator. Teams Phone is required. Config: Assign the operator number to the user. Do not also treat it as a spare Calling Plan. Fault: One human has two different caller IDs and the CRM matches neither.
Direct Routing You connect a certified SBC to Teams and bring your own carrier. Users need Teams and Teams Phone. They must be homed online. Islands mode is not supported. Config: Pair the FQDN, open 5061, allow media ranges, assign a voice route. Fault: The SBC is up and the user has no voice routing policy.
Sister technologies
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.
Config and troubleshooting
One person has two caller IDs and the CRM matches neither.
Cross-platform bridges
CUCM
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.
Webex
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.
UCCE
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.
Public switched telephone network — Wikipedia — last checked 2026-10. Wikipedia fallback for background. Confirm the vendor page before you change a tenant
Session Initiation Protocol — Wikipedia — last checked 2026-10. Wikipedia fallback for background. Confirm the vendor page before you change a tenant
Microsoft Teams blog index — Community — last checked 2026-10. Community index for the Microsoft Teams blog. This is the index, not a claim that a post discusses this room
