SBC

How to validate the new Teams Direct Routing certificates

Introduction In December 2025, Microsoft published a message MC1213773 in the Message Center of the Microsoft 365 Admin Center, explaining that new certificates were required to maint

New root certificates required for Teams telephony

Maxime Hiez
Teams
15 Dec, 2025

Introduction If you have set up Teams telephony via Direct Routing in your Microsoft 365 environment, you depend on TLS/mTLS connectivity between Microsoft SIP proxies and your *Sessi

How to reroute a 404 call with an Audiocodes SBC

Introduction When a call is sent to an unknown number or extension in a business telephony solution, the call fails and returns an error. Sometimes, this extension is known in another syste

How to configure and analyze emergency calls in Teams

Introduction Microsoft Teams telephony offers an essential feature for organizations : emergency call management. This feature allows users to make emergency calls while dynamically providi

How to enable LDAP routing in an Audiocodes SBC

Introduction LDAP (Lightweight Directory Access Protocol) routing over an SBC (Session Border Controller) allows calls to be managed using information stored in an Active Directory.

Import the DigiCert Root G2 certificate into an Audiocodes SBC

Introduction Since the arrival of Teams Direct Routing telephony, TLS certificates used by Microsoft servers are linked to the following root certification authority :Common Certificate

Import the DigiCert Root G2 certificate into a Ribbon SBC

Introduction Since the arrival of Teams Direct Routing telephony, TLS certificates used by Microsoft servers are linked to the following root certification authority :Common Certificate