Tom Talks Microsoft Teams and Microsoft 365 news and opinions

Microsoft Teams Direct Routing GA, 11 Partners already offering hosted options

Good news, Microsoft Teams Direct Routing, the feature that allows you to connect your own Session Border Controller and PSTN Carrier to Microsoft Teams for user phone numbers, is now generally available.

Deploy your own SBC and connect your preferred SIP carrier/Interop with your existing telephony system


AudioCodes and Ribbon are the currently certified Session Border Controllers if you want to host and manage your on on-premises.

Here is a full list of certified Session Border Controllers:


Both have hardware and software SBC options. Thinktel have their own SBC that is certified, but it’s a carrier system, not one for enterprises.

Interestingly AudioCodes have a Virtual Edition SBC which is supported by them in Microsoft Azure, so conceptually you can run your Microsoft Direct Routing certified SBC in Azure. I know this technically works, but there is nothing public about Microsoft’s support stance.

Have a partner host and manage the SBC and carrier connection for you


If you have no requirement to interop with an existing phone system/other on-premises systems, you might choose to have a partner host the SBC and manage the PSTN carrier connection for you. Microsoft outline 12 partners who have already tested this who can offer this option:

There are some very big providers on that list, and I’m sure more will be adding options.


Official Blog post:

Deep Dive Video:


About the author

Tom Arbuthnot

A Microsoft MVP and Microsoft Certified Master, Tom Arbuthnot is Founder and Principal at Empowering.Cloud as well as a Solutions Director at Pure IP.

Tom stays up to date with industry developments and shares news and his opinions on his, UC Today Microsoft Teams Podcast and email list. He is a regular speaker at events around the world.

  • Tom Talks Microsoft Teams and Microsoft 365 news and opinions