Overview – Microsoft Teams Direct Routing

Microsoft Teams is a great tool for remote working and collaborating with your colleagues. The Phone System option in Teams means you can use it as a direct replacement for your existing phone system and fully embrace Unified Communications in a single application. Direct-routing-mobile-laptop-phone  To communicate with external contacts on a voice network, you will need to break-out either through Direct Routing, or with a Microsoft Calling Plan.

Making the right decision on this can have major cost implications. Clarion can give you a contended trunk option that will be more economical for your business than calling plans from Microsoft and most other providers.


If you choose a Microsoft 365 Calling Plan you have to take a minutes bundle for each user.  The bundled minutes are low and if you go over these then you will need to top-up with a credit card to purchase Communication Credits before being allowed to make or receive any further calls. With the majority of Direct Connect suppliers, they require you to have a dedicated SIP Trunk for everyone. Clarion can provide dedicated SIP Trunks but for larger deployments we also offer a contended SIP Trunk model.  Not everyone is going to be making a call at the same time so why pay for more trunks than you need?

Key Benefits

Receive and make inbound/outbound calls directly from Microsoft Teams

Keep your existing inbound numbers

Unifies your communications platform

Flexible cloud-hosting enables expansion when required

Avoids being tied in to a costly Microsoft calling plan

Contended SIP Trunks available from Clarion for call resilience and continuity

Call Recording available

Lower telephony charges with a contended trunk optionFIND OUT MORE


Use the table below to compare the saving you can make with Clarion Direct Routing over a Microsoft Calling Plan –

Once your system is connected you can use Teams via Direct Connect to place or receive business calls, create voice menus, monitor and record calls and  queue from landlines and mobile phones on the public switched telephone network (PSTN).


To set up Teams Direct Routing you will need a Session Border Controller (SBC) and the correct licensing from Microsoft. The SBC is a complex but essential part of the network that can be based on site or in the cloud for more flexibility and lower up-front cost. Clarion would provide a cloud-based SBC.

Session Border Controllers (SBCs) act as controls between different networks, and manage the flow of voice and media data between Teams and a SIP. At the point where the networks converge, the SBC ensures this data is transferred smoothly and securely – much in the same way that a firewalls work for a computer.

Clarion can supply, configure and manage Session Border Controllers at no additional cost, and we can offer contended SIP Trunks via Direct Routing for Microsoft Teams.


Direct Routing leverages all the benefits of Teams but gives the option to contend SIP Trunks to control costs. If you are looking to use Teams as a unified communication pathway for your business, please call us to assist with your licence, configuration and migration options.

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