Migrate To Microsoft Teams Phone

Migrate to Microsoft Teams Phone without replacing your existing voice platform. Connect your existing voice estate then migrate users and numbers at your own pace.

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Diagram showing how easy it is to connect your numbers to Callroute.

What Is a Teams Phone Migration?

A Microsoft Teams Phone migration is the process of moving your organisation’s PSTN calling services into Microsoft Teams, enabling users to make and receive external calls directly from the Teams app.

Rather than a “rip and replace” project, organisations can migrate at their own pace from on-premises PBXs, Cisco Webex Calling, hosted PBXs and other cloud calling platforms. This allows users, sites or countries to transition gradually while existing voice services continue to operate, reducing risk and disruption.

Why Choose Callroute for Your Teams Phone Migration

Unlike traditional migration approaches, Callroute sits in the call path while your existing voice services continue to operate uninterrupted.

Once your phone numbers are routed through Callroute, Microsoft Teams becomes another available destination, enabling you to migrate users, phone numbers and services gradually, without disruptive day-one cutovers.

Connect Your Existing Voice Platform

Connect your existing PBXs, hosted PBXs, analogue devices and SIP platforms to Callroute while maintaining your current calling services.

Migrate at Your Own Pace

Gradually migrate users, phone numbers, sites or departments to Microsoft Teams without disrupting existing voice services or business operations.

Bulk Provision Teams Users

Quickly provision Teams Phone users, assign phone numbers and apply voice policies using CSV imports without requiring PowerShell expertise.

Centralise Number Management

Manage and organise all your phone numbers from a single portal, providing complete visibility throughout your Teams Phone migration.

How It Works

  • 1

    Connect Your Existing Voice Platform

    Connect your existing PBX, hosted voice platform (including Cisco Webex Calling), SIP-based telephony or analogue equipment to Callroute. Continue using your existing SIP carrier or port your phone numbers to Callroute.

  • 2

    Callroute Becomes the Orchestration Layer

    Once Callroute is in the call path, your existing voice platform and Microsoft Teams work together. End users continue working as normal while administrators gain complete visibility and control.

  • 3

    Migrate in Phases

    Move users, phone numbers and services to Teams Phone as and when you’re ready. Migrate by user, department, site or business unit, without a disruptive cutover.

  • 4

    Manage Everything from One Portal

    Bulk provision Teams Phone users, assign numbers and policies, and centrally manage your phone number estate throughout the migration.

Key Features To Enable Seamless Teams Phone Migrations

Connect Existing Voice Platforms

Run Microsoft Teams alongside your existing voice platform, whether that’s an on-premises PBX, hosted PBX, SIP-based telephony, analogue equipment or Cisco Webex Calling. Callroute sits in the call path, enabling a phased migration without replacing your existing telephony.

Connect Your Services To Callroute
Diagram showing multiple operators that can connect with Callroute.

Bring Your Own Carrier

Continue using your existing SIP carrier throughout your Microsoft Teams Phone migration, avoiding the need to wait for existing contracts to expire. When you’re ready, you can optionally port your phone numbers to Callroute, consolidating your voice services into a single bill through our global network of Tier 1 carrier partners.

Self-Service User Migration

Once Callroute is in the call path, migrate users and phone numbers to Microsoft Teams Phone in stages, giving administrators complete control over the rollout.

Diagram showing user assignment to Teams groups.
Diagram showing phone number management.

Import and Manage Phone Numbers

Quickly add your phone number inventory by importing numbers via CSV or automatically synchronising numbers from your Microsoft Teams tenant. Manage everything from one central portal throughout your migration.

Teams Policy Management

Apply and manage Teams Phone policies consistently across your organisation, helping ensure users receive the correct configuration throughout the migration.

Diagram showing Teams persona manager with a create button.

3 Reasons You Might Want To Migrate To Teams Phone

Modernise Without Disruption

Move away from ageing PBXs and fragmented voice platforms while migrating at your own pace. Teams Phone enables organisations to modernise without a disruptive “rip and replace” project.

Reduce Cost and Complexity

Consolidate voice services, simplify administration and reduce operational overhead by managing users, phone numbers and calling policies from a central platform.

Increase Business Productivity

Give employees a single application for chat, meetings and enterprise calling. By bringing telephony into Microsoft Teams, users no longer need to switch between multiple communication tools.

What Our Customers Say

“Overall very good. Its a simple product, easy to use. Company good to deal with, quick to respond to issues and knowledgeable support team.

Quick to assign numbers to users. Very easy to find either free unused number or those that are allocated and who to. Tagging system is useful for reporting.”

Toby

Head of Service Management in UK

Publishing, 1,001–5,000 Employees

“Overall, my experience with Callroute was solid. The platform offered strong integration capabilities and simplified several aspects of voice routing and number management. While there were areas that could be more intuitive, the core functionality was dependable and added value operationally.
What I liked most about Callroute was how seamlessly it integrates with existing communication platforms. It removes a lot of the complexity around voice routing and number management, which makes day‑to‑day operations much smoother.”

Verified Reviewer

Verified User

Insurance, 11–50 Employees

“Our partnership with Callroute has always been outstanding. Communication is seamless, and they consistently demonstrate exceptional customer focus. They are not just a partner; they are a true enabler of global telephony uptime. Their support is exceptionally responsive and a pleasure to work with, even on the rare occasions it’s needed.”

Dave

Health, Wellness & Fitness, 1,001–5,000 Employees

Telephony Engineer in UK

Used the Software for: More than 2 years

“Happy user. Has been great. This makes it much easier to manage numbers. Ease of use and quick support when I have had any issues.”

James

Technical Specialist - Collaboration in US

Packaging & Containers, 10,000+ Employees

Used the Software for: Less than 6 months

“Makes Teams Phone Managers lives easier! Callroute lets you manage Microsoft Teams Phone configuration by an easily and user friendly portal. Callroute separate the Teams telephony settings from the Teams Admin center so that the telephony administrator can only configure that what is neccesary for Teams Phone functionality and call routing… makes Teams Phone management clear and easy!”

Arnold

Product Manager Cloud in Netherlands

Telecommunications, 11–50 Employees

Used the Software for: Less than 6 months

“Works with Microsoft Teams and a better management platform – easier to use than older ‘clunkier’ platforms. Callroute is value for money in one platform. Easy to use and a great experience, with simple management for all changes.”

Ronald

Managing Director in UK

Information Technology & Services, 2–10 Employees

Used the Software for: More than 2 years

“The Orto product has allowed us to completely streamline the Teams Phone System provisioning process for around 3500 users, saving myself and my colleagues a lot of time. Callroute as a company have a great support response and are also very open with sharing upcoming features and taking in feature requests. Overall, I couldn’t fault them…the product itself has taken a weight off my teams shoulders in a very busy project.”

Elliott

ICT Network Support Officer in UK

Government Administration, 1,001–5,000 Employees

Used the Software for: Less than 12 months

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