Microsoft Teams calling made easy

A unique self-service platform to deliver external calling to Microsoft Teams, Cisco Webex and legacy equipment.


What is Callroute?

Callroute is a service offered by sipsynergy that delivers market leading PSTN integration with UCaaS, CCaaS platforms as well as traditional on-premise telephony equipment. Our unique technology automates deployment via a self-serve portal meaning your customers can be making calls in just a few minutes.

Microsoft Teams


Callroute offers unique Direct Routing technology

Cisco Webex


Integrate external PSTN calling with Cisco Webex

Genesys Cloud CX

Cloud CX

Contact centre PSTN integration. Enhance agent call quality

SIP Trunks


Connect your PBX or legacy equipment with Callroute SIP Trunks

Trusted by businesses across the globe

Callroute is trusted by businesses globally. Discover how we transformed our customers' phone systems.

Roc Technologies

"Callroute managed the porting of a huge quantity of existing numbers to their solution, as well as migrating additional business areas after initial deployment. We were impressed with the significant cost savings we enjoyed as a result, as we now spend 40% less a month on our telephony system."

Brett Everett - Customer Services Director, Roc Technologies

Evaluate the service for free

Our free channel and phone number enables quick and easy testing of the Callroute service

  • 1 voice channel
  • 1 telephone number **
  • 250 monthly domestic minutes
  • Analytics and reporting

* Applicable to UCaaS integrations only.

** Free channel is currently limited to the UK. For other locations please contact us.

Callroute Features

Experience the clear voice quality of a sophisticated telephony system. The difference is your ability to seamlessly connect it to your chosen UCaaS, CCaaS and legacy environment

Superior Call Quality

Superior call quality

Enjoy HD call quality that your business can rely on. A clear connection without interference or delays.

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Integrate In Minutes

Integrate in minutes

Configure your service environment for calling without complex barriers or scripting.

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Number Porting

Port your numbers

Keep your phone numbers, and manage all of your numbers and calls in one central portal.

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Analytics and Reports

Analytics and reports

Review call and billing records and more to get the most out of your system and stay in control.

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Security and Privacy

Security and privacy

End-to-end encryption and years of telephony experience ensures private and secure communications.

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Personalised Support

Personalised support

Get technical support when it's needed keeping your business running and your customers happy.

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Global Calling


Access over 10 million global numbers. Affordably place and receive calls using a local presence.

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System Flexibility

System flexibility

Scale your monthly capacity up or down as required using our unique autoscaling technology.

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Contact Us

Speak to a member of our team and learn how Callroute can transform your telephony.


Enabling you to seamlessly make and receive calls through your chosen service.

Superior Call Quality

Integrate legacy equipment

Callroute connects legacy telephony to the cloud and simplifies the integration and management through the self service portal.

Flexible and Cost-Effective Pricing

Flexible and cost-effective pricing

Only pay for the channel capacity you need and share across different services and geographies.

Deploy Without Disruption

Deploy without disruption

No commitments, and getting started won’t impact other telephony. Experiment with a free channel and phone number for life.

Analytics and Reports

Flexible capacity to match demand

If your business has unpredictable capacity requirements, you need solutions with the flexibility to match. Scale up or down as required.

Get Started

It's free and easy to do, no card required. Start making calls in minutes.

Step 1

Sign up to Callroute

In a couple of minutes you'll be ready to integrate Callroute with your chosen service.

Step 2

Select your plan

Start with a free channel or jump straight in with a minimum of five channels.

Step 3


Integrate with your chosen service, purchase or port numbers and scale as required.