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Microsoft Teams Voice

A modern, cloud-first phone system built for hybrid work, mobility, and multi‑site organisations.

Fully managed by Spectrum.

Why Choose Microsoft Teams Voice

Microsoft Teams Voice brings all your calls, collaboration, and communication tools into one familiar platform. As certified Microsoft Operator Connect partners, Spectrum delivers a fully managed telephony service that replaces legacy phone systems with a cloud-based, reliable, and scalable solution.

Designed for the way your teams work today

Microsoft Teams Voice transforms Teams into a complete enterprise phone system, enabling your staff to make and receive external calls from any device, anywhere.
Modern businesses are looking for reliability, mobility, AI-enhanced features, secure PSTN connectivity, and seamless user experience, and Teams Voice delivers all of this in one platform.

Based on current enterprise adoption trends, organisations are moving to Teams Phone for several reasons.

Unified calling, messaging & meetings in one app

Teams Phone consolidates voice, video, chat, and collaboration into the experience your staff already use daily.

Cloud-first telephony built for hybrid work

Modern businesses need flexible calling from anywhere. Home, office, mobile with the same number and features. Make and receive internal and external calls directly in Microsoft Teams on your laptop, mobile, or desk phone, no complex hardware required.

Reliability and scale

Teams Phone is an enterprise-grade telephony system used by global organisations, offering enhanced call management and reduced infrastructure overhead.

Lower cost, reduced complexity

Businesses are eliminating old PBXs, SIP hardware, and maintenance costs by moving to a cloud solution managed from one admin centre.

Teams Voice Licences

Teams Phone Standard
 
Enables cloud PBX calling inside Microsoft Teams
 
Teams Phone Mobile
 
Links a user’s mobile SIM + Teams number into one identity.
 
Teams Phone Shared Device License
License for common-area phones like receptions, classrooms, workshops, or shared spaces.
 
Operator Connect Calling
 
Provides PSTN connectivity, calling minutes and reliability. Volume-based discounts available.
Resource Account Licenses
 
Licenses for Auto Attendants and Call Queues.
 
Audio Conferencing
Allows users to dial into Teams meetings via a phone number.
 
Microsoft Teams Rooms
To enable Microsoft Teams Rooms on certified hardware, Microsoft offers two licence types: basic & pro.
 
  • Teams Rooms Basic — Free for up to 25 rooms
  • Teams Rooms Pro — Advanced features for larger or more complex rooms

Typical Pricing

Microsoft Teams Phone Standard 
£8.09 per user/month
Operator Connect
£4.00 per user/month
Teams Room Pro
£30 per room per month
 
Licensing costs shown are typical rates. Final pricing may vary depending on configuration and volume.

Operator Connect for microsoft Teams

A simpler, faster and more reliable way to enable PSTN calling in Microsoft Teams.

Operator Connect lets you link Microsoft Teams directly to the public telephone network (PSTN) through a certified telecoms provider, without any on‑prem hardware, SBC management, or PowerShell configuration. It’s the preferred choice for modern organisations wanting a cloud-first, low‑maintenance telephony deployment.
 

It offers:

  • Direct Azure peering for higher call quality and reliability
  • Operator-managed PSTN access and infrastructure, removing the need for customer SBCs or complex routing setup 
  • Fast deployment and easy number assignment through the Teams Admin Centre
  • Supports keeping existing numbers or requesting new ranges, ideal for migrations and multi‑site rollouts
With the 2027 PSTN switch-off, businesses are upgrading phone systems rapidly. Operator Connect is recommended as a direct replacement for ISDN/WLR services.

Microsoft Teams Voice – Operator Connect Architecture

Network diagram showing how Microsoft Teams connects to the PSTN through Operator Connect, with Spectrum branding and device endpoints including desktop, mobile and Teams IP phones.

How Spectrum delivers Operator Connect

As a certified Operator Connect provider, we deliver:

  • Fully managed PSTN access with resilient voice routing
  • Simple number porting and provisioning
  • Enterprise-grade SLAs and support for voice services
  • Guaranteed compatibility with Teams-certified devices
  • Seamless integration with existing Microsoft 365 environments


Combined with our migration, configuration and training services, Operator Connect becomes the easiest way to move your organisation to Microsoft Teams Voice with confidence.

Main Features

  • Advanced Call Management
  • AI‑Enabled Calling
  • Mobility & Device Flexibility
  • Operator Connect Calling
  • PSTN Switch-Off Ready
  • Contact Centre Integration

Why Spectrum?

Trusted by education, public sector and multi‑site organisations across the UK
  • Microsoft Operator Connect partner
  • No‑downtime migrations
  • Local UK support
  • Telephony experts with education & public sector experience

Speak to a Teams Voice Specialist today

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Teams Voice for Multi‑Site Organisations

Whether you operate across multiple offices, campuses, or business units, Spectrum ensures a unified Teams Voice experience.

We specialise in:

  • Education & multi-campus organisations
  • Local government
  • Healthcare
  • Multi-site UK businesses
  • Hybrid, mobile, or frontline workforces
  • Organisations transitioning from legacy PBX systems
Spectrum specialises in multi-site rollouts, supporting phased, site‑by‑site or batch‑based migration.

Mobility & Device Flexibility

Teams Phone works on a full range of devices, Workers can switch devices mid-call between their devices.

Desktops

Deskphone

Tablet

Meeting Rooms

Mobile

Conference devices

Devices for Every Workspace
Spectrum delivers a full range of Teams-certified hardware:
 
Desk Phones
Full range of end user devices covering common areas through to executive users.
  • Yealink MP52 – Common areas & classrooms
  • Yealink MP54 – Standard office workers
  • Yealink MP56 – Advanced users & reception environments
  • Yealink MP58 – Premium executive handset
 
Headsets
Wired USB headsets and DECT wireless models for mobility.
  • Wired USB headsets for all-day comfort
  • DECT wireless headsets for mobility and flexibility
  • Monaural & Bianural for specific use cases
 
Reception Console
Compatible with MP56 & MP58, add up to 3 per phone
  • EXP50 expansion module for high-volume call handling
 
Conference & Room Devices
Certified Teams Room systems for meeting rooms and spaces, including conference phones, touch panels, soundbars, cameras, speakers and sensors.

Microsoft Teams Rooms & Meeting Spaces

Upgrade your meeting spaces with Microsoft Teams Rooms that deliver consistent, high‑quality collaboration for hybrid teams. We design, deploy, and support solutions for small huddle rooms through to large boardrooms, ensuring clear audio, intelligent video, and simple one‑touch meetings.
 
Room Types We Support
  • Small Rooms: Compact video bars + touch controls
  • Medium Rooms: Dual displays, table mics, all‑in‑one systems
  • Large Rooms: Multi‑camera setups, ceiling mics, advanced audio, wireless casting
 
Small Meeting Room
Medium Meeting Room
Large Meeting Room

Complete Room Packages

We supply everything including Teams-certified devices, displays, speakers, microphones, mounting, installation, and full handover documentation.

Contact Centre Integration

Modern organisations need more than basic call queues. They need full customer engagement solutions that integrate seamlessly with Teams. Microsoft now supports deep contact centre integration through its certified models, enabling businesses to unify customer interactions, agent workflows, analytics, and collaboration inside a single platform.
Microsoft Teams acts as the hub for customer communication across voice, chat, and meetings, while certified Contact Centre as a Service (CCaaS) platforms provide advanced routing, reporting, and omnichannel capabilities.
Essential for sectors like education, healthcare and customer service. Teams Phone supports:
 
  • Third-party contact centres
  • Compliance recording
  • CRM integration
 
Microsoft operates a full Teams Contact Centre Certification Program that validates solution quality, security, and compatibility.
 
Find out more

Professional Services

Delivered by Spectrum

Spectrum provides end-to-end deployment services to make your migration simple and risk-free.

Illustration showing the Spectrum step-by-step deployment process for Teams Voice, including discovery, design, build, testing, porting, decommissioning old systems, and final handover.

Discovery & Audit

We assess your current telephony, extension lists, analogue lines, room layouts and user needs to build the right solution

Solution Design

Full configuration design covering: User profiles (softphone, headset, desk phone) Call flows, queues, auto attendants Reception workflows Analogue migration planning Teams Rooms device specification

Build & Configuration

Spectrum engineers fully pre-build your Teams Voice environment using placeholder numbers, including: Queues, auto attendants, policies Emergency routing Device policies Operator Connect routing

Number Porting

We manage the entire porting process — liaising with your losing provider, validating number ranges, coordinating cutover, and completing all testing.

UAT, Go-Live & Migration Support

Testing internal/external calling, queue behaviour, voicemail, devices and emergency call functionality. Choose remote or onsite support to ensure a smooth transition. Ideal for multi-site cutovers and high-volume reception areas.

Training for All Users

End-user Teams calling training Receptionist & high-volume call handler training Technical administrator training.

Ready to Migrate to Microsoft Teams Voice?

Whether you’re replacing an ageing PBX, preparing for PSTN switch-off, or consolidating communications across multiple sites, Spectrum makes your move to Teams Voice simple, secure and future-proof.

Speak to our specialists today.

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FAQ

Yes. Spectrum handles the full number porting process, including validation, liaison with your current provider, test plans and coordinated cutover, ensuring no disruption to your service.
Most users require a Teams Phone Standard licence and a PSTN connectivity method such as Operator Connect. Shared devices and common‑area phones require Teams Shared Device licences, and meeting rooms require Teams Rooms Basic or Pro depending on the room complexity.
Calling Plans route all calls through Microsoft’s PSTN service, while Operator Connect uses a certified telecoms provider for direct, carrier‑grade connectivity. Operator Connect offers better pricing, better call quality, and faster provisioning compared to Calling Plans.

time applications

No. Operator Connect provides a 100% cloud‑based solution with no SBCs or servers needed onsite. All routing is handled securely through Microsoft Azure.
Absolutely. You can choose any combination of Teams‑certified devices including headsets, desk phones, conference phones and room systems. Each user can switch between devices seamlessly.
No. Spectrum pre‑configures your environment in advance and performs number porting at a planned cutover time. Your existing system remains active until the moment you move to Teams.
Yes. With Teams Phone, Operator Connect, call queues, auto attendants, call recording options, and contact centre integration, Teams can fully replace legacy PBXs and on‑prem phone systems.
Most modern business-grade connections are suitable. If required, Spectrum can advise on bandwidth, QoS and network readiness to ensure high‑quality voice performance.

We offer full migration assistance including discovery, design, configuration, staging, go‑live support, training, troubleshooting, and post‑deployment optimisation.

Yes. Many modern CCaaS platforms integrate directly with Teams. Spectrum can help you evaluate whether your current solution is compatible or recommend a Teams‑certified contact centre when needed.

Client feedback
5 stars for superfast service.
The Pioneer Group
I love Spectrum they always do what they say
Royal Institute of Chartered Surveyors
Awesome World class customer service from Spectrum and Chloe as usual
Checkland Kindleysides
Super helpful and quick - my work phone got stolen and the team was able to issue a replacement immediately + were super helpful with follow up questions.
Warner Brothers
Spectrum very efficient in providing services. Response to emails is sooo quick and they always give good advice to issues.
Keep it up
University of Bristol
about us

Proud to help.

Spectrum was created with the aim of providing clients with cost effective solutions for communication services, supported by exceptional account management. 

Spectrum’s highly skilled and experienced team is focused on keeping at the forefront of telecoms technology including product differentiation and market leadership.

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