List of Session Border Controllers certified for Azure Communication Services direct routing

This document contains a list of Session Border Controllers certified for Azure Communication Services direct routing. It also includes known limitations.

Microsoft is working with the selected Session Border Controllers (SBC) vendors certified for Teams Direct Routing to work with Azure direct routing. You can watch the progress on this page. While the SBC, certified for Teams Direct Routing, can work with Azure direct routing, we encourage not to put any workload on the SBC until it appears on this page. We also do not support the uncertified SBC. While Azure direct routing is built on the same backend as Teams Direct Routing, there are some differences. The certification covers comprehensive validation of the SBC for the Azure direct routing.

Microsoft works with each vendor to:

  • Jointly work on the SIP interconnection protocols.
  • Perform intense tests using a third-party lab. Only devices that pass the tests are certified.
  • Run daily tests with all certified devices in production and pre-production environments. Validating the devices in pre-production environments guarantees that new versions of Azure Communication Services code in the cloud will work with certified SBCs.
  • Establish a joint support process with the SBC vendors.


Functionality described in this document is currently in public preview. This preview version is provided without a service-level agreement, and it's not recommended for production workloads. Certain features might not be supported or might have constrained capabilities. For more information, see Supplemental Terms of Use for Microsoft Azure Previews.


For customers using voice channel in Dynamics 365 Customer Service Enterprise, Microsoft provides GA level of support for all the direct routing related scenarios. To learn more about voice channel, see Introduction to the voice channel.

Media bypass is not yet supported by Azure Communication Services. Early media is not supported by a web-based client. The table that follows list devices certified for Azure Communication Services direct routing.

If you have any questions about the SBC certification program for Communication Services direct routing, contact

Certified SBC vendors

Vendor Product Software version
AudioCodes Mediant Virtual Edition SBC 7.40A
Mediant 500 SBC 7.40A
Mediant 800 SBC 7.40A
Mediant 2600 SBC 7.40A
Mediant 4000 SBC 7.40A
Mediant 1000B SBC 7.40A
Mediant 9000 SBC 7.40A
Metaswitch Perimeta SBC 4.9
Oracle Oracle Acme Packet SBC 8.4
Ribbon Communications SBC SWe / SBC 5400 / SBC 7000 9.02
SBC SWe Lite / SBC 1000 / SBC 2000 9.0
TE-SYSTEMS anynode 4.6

Note the certification granted to a major version. That means that firmware with any number in the SBC firmware following the major version is supported.

Next steps

Conceptual documentation