Microsoft Teams Calling
Your PBX is retiring. Teams becomes your organization's full cloud phone system: fixed numbers, menus, queues and call handling — inside the environment where your team already meets and collaborates.
What it is
Calling as part of your workplace
With Teams Calling (Teams Phone) you call over the public network from the Teams client — on laptop, mobile or desk phone. No separate PBX, no maintenance contracts, no islands.
Users, numbers, voice policies, dial plans, auto attendants and call queues are configured and managed centrally from Microsoft 365. Opening hours and exceptions are managed by your own team, without a vendor ticket.
- Number retention. Existing numbers and ranges are ported — including planning, LOA and fallback.
- Full telephony features. Menus, queues, voicemail, busy-on-busy, caller ID policy and speed dial.
- Emergency calling arranged. Emergency addresses per user, agreements for mobile and home work.
- Manageable. Opening hours, holidays and exceptions managed centrally by your own team.
PSTN connectivity
Three routes to the phone network
The right PSTN connection depends on your organization, operator landscape and ambitions. We advise independently — and configure what fits.
OPTION A
Operator Connect
A certified operator linked directly to your Teams tenant, managed from the Teams Admin Center. The fastest and most manageable route for most organizations.
OPTION B
Direct Routing
Maximum flexibility through a Session Border Controller. Suited to complex scenarios, specific operator requirements or links with existing infrastructure.
OPTION C
Teams Phone Mobile
The employee's SIM becomes part of Teams: one number for mobile and fixed, native call quality, no app required.
Teams Phone Mobile
One number. Every device.
For employees who mainly work on the move, an app can be a barrier. Teams Phone Mobile links their SIM card directly to the Teams environment.
Calls run natively over the mobile network but are fully part of company telephony: visible in Teams, included in call flows, governed by your own policies. Ideal for field service, technicians and roles without a fixed desk.
- Business and private separated on a single physical device.
- Native call quality — no data coverage or app friction.
- Full policy applies: recording, caller ID, availability.
- Part of your call flows and queues where desired.
What Voicinity does
From inventory to go-live
A Teams Calling migration is more than assigning licenses. We own the entire journey: technology, functional design and the human side.
Frequently asked questions
Teams Calling in practice
Can we keep our existing phone numbers?
Yes. Existing numbers and number ranges are ported to the new environment. We plan the porting including lead times, LOA formalities and a fallback during the transition, so your reachability is guaranteed.
What is the difference between Operator Connect and Direct Routing?
Operator Connect links a certified operator directly to your Teams environment, managed from the Teams Admin Center — simple and fast. Direct Routing uses a Session Border Controller and offers maximum flexibility for complex scenarios and integrations. We advise independently which route fits your situation.
What happens to analog lines such as elevators, alarm systems and intercoms?
Analog connections are inventoried during the Discover phase. For each line we determine: decommission, connect via an ATA gateway, or keep on a separate connection. This prevents a forgotten elevator line from blocking your go-live.
Which licenses are required?
Users need Teams Phone capability: Microsoft 365 Business Premium or E3 plus Teams Phone, or E5 which includes Teams Phone. We analyse your current licenses and recommend the most cost-efficient mix — there is often more in your existing agreement than you think.
Will emergency calls such as 112 keep working?
Yes, provided it is configured correctly. An emergency address is registered for every user, and clear agreements are documented for mobile and home workers. This is a standard part of every Voicinity design.
What about call quality on our network?
Before the design, we run connectivity checks on wired and wireless connections and assess QoS, firewall, proxy/SWG, VPN and VDI scenarios. Network requirements and DSCP configuration are documented so voice always gets priority.
Curious about your route?
Have your telephony landscape assessed
One conversation tells you which PSTN route fits, what happens to your numbers, and where the pitfalls are.
Book an intro call →