Connect your on-premises PSTN to Microsoft Teams

Accelerate your Microsoft Teams Phone adoption by connecting your existing PSTN lines to Teams without any additional infrastructure, carrier contracts, number porting needed.

Accelerate Teams Phone Usage

Reduce the barriers preventing you from using Teams Phone with Callroute

Use existing phone lines

Connect your existing on-prem phone lines to Teams without changing your hardware

Integrate with your PBX

Continue to use your current PBX alongside Teams with integrated calling

Keep your numbers

Move users between your PBX & Teams keeping their current number & extension

Connect telephone providers and call carriers to Microsoft Teams

Connect your PSTN to Teams from any country

Keep your existing on-premises PSTN connectivity at any location and connect your voice gateway to Microsoft Teams using Callroute.

PSTN, PBX and Teams integration

Share your on-premises PSTN service between Microsoft Teams and your existing PBX platform.

Route callers to your users whethere they are using Teams Phone or your PBX.

Maintain internal calling between Teams Phone users and your PBX users and services on-net with Callroute.

Connect telephone providers and call carriers to Microsoft Teams

Business Benefits

Using Callroute versus other connectivity solutions offers businesses better value and the quickest route to Teams Phone

Fast & scaleable

The fastest route to Teams Phone on the market that will scale alongside you

Cost efficient

Keep using your existing hardware and contracts. Pay for Teams users only

Service continuity

No number porting. Maintain your existing services without disruption

Callroute voice deployment for Microsoft Teams

Connect to Microsoft Teams in minutes

Deploy Microsoft Teams Direct Routing in minutes using Callroute’s automated deployment.


Start your cloud voice transformation

Connect your existing phone lines to the cloud with no additional infrastructure required.

Use your current voice gateway and connect to Callroute over the internet to enable cloud calling for use with Microsoft Teams.

Connect on-premises phone systems and ISDN lines to Microsoft Teams
Assigning a number to create automatic failover in Microsoft Teams

Migrate users to Teams Phone in one click

Move your users to Microsoft Teams Phone, keep their existing number and extension in one click using our simple to use self-service portal.

Migrate single users or multiple users at a time. Make the jump from proof of concept to full enablement quickly and easily.

Start your Microsoft Teams Phone project now

No other Microsoft Teams voice connectivity provider offers this level of integration and enablement

Our Customers

Join our growing list of customers using Callroute for their Microsoft Teams Phone connectivity

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Rushmoor Borough Council logo
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Get in touch

+44 204 517 8000
Intermittent Microsoft Teams calling issues reported globally. This issue appears to be affecting all Microsoft customers worldwide. Microsoft are currently investigating the issue. All Callroute systems are fully operational. More information will be provided as soon as possible.