As I talked about on my 5 types of hybrid blog post, the only option to bring your own PSTN carrier to Microsoft Teams will be a model where you connect your own SBC directly to Microsoft Teams/Office 365. This has previously been referred to as “BYOT” (Bring Your Own Trunk) and “Direct Connect”, but has now been more formally announced as “Direct Routing”.
In a blog post accompanying announcements at Enterprise Connect Microsoft Confirmed
- You will require a certified SBC from Ribbon (Sonus) or AudioCodes
- Other SBC vendors may be added in the future
- ThinkTel (Canadian carrier) will also support this scenario, the first direct carrier support to be announced
- Microsoft Teams and Phone System licences
Direct Routing will be supported for Microsoft Teams only, not SfB Online. From Nikolay Muravlyannikov of Microsoft: “If you use a supported SBC (AudioCodes or Ribbon) with the CCE you can pair the same SBC, which is paired to CCE, to the Teams backend and migrate users from SFBO to Teams. It is a matter deploying Teams client and changing the voice routing on SBC and in our Cloud. Once all users migrated you can decommission the CCE [element of the box]”
Previously Microsoft have always talked about this scenario as the customer bringing the SBC, it’s exciting to see a carrier, ThinkTel being supported. I think as more carriers support Direct Routing this will be a very common customer deployment scenario, meaning the customer needs no local infrastructure.
Microsoft call out the following scenarios:
- Easy Transition to Calling in Teams. By integrating with an existing PBX, pilot users can be moved to Calling in Teams while users remain on their legacy PBX. Eventually all users can be easily transitioned to Calling in Teams. The call traffic between these users during the transition stay within the organization.
- Telephony System Inter/Op. While users are being transitioned to Calling in Teams, Call Center agents can continue to use their application. Direct Routing enables both use cases to coexist. The call traffic between call center agents and Teams users stay within the organization.
- Support for Analog Devices. If an organization decides to move to Calling in Teams but has analog devices such as elevator phones or overhead pagers, these devices can be connected to Teams and Phone System via Direct Routing. Call traffic between analog devices and Teams users stay within the organization.