In this section:
This document details the configuration required for an SBC SWe Lite to offer Microsoft Teams Phone System-related Direct Routing services in Microsoft Azure. The SBC SWe Lite can be used to connect an enterprise's Teams clients to:
SIP trunk from a third-party provider (PSTN)
From the Azure public cloud, the SBC SWe Lite offers the same features offered in an on-premises deployment (based on Microsoft®, Hyper-V®, VMware® vSphere® ESXi, or Linux® KVM) in support of Direct Routing, such as:
The SBC SWe Lite is certified for Teams Direct Routing media bypass and non-media bypass services. Please refer to Microsoft Teams Phone System Direct Routing certification page.
These instructions assume the SBC SWe Lite product is deployed via Microsoft Azure and running. If the product is not installed, refer to Deploying a SBC SWe Lite via Azure Marketplace.
Consult the Microsoft documentation for detailed information on Direct Routing interface configuration guidelines, including the RFC standards and the syntax of SIP messages.
Ensure you are running the latest version of SBC software:
Requirements for configuring the SBC Edge in support of Teams Direct Routing include:
For the SBC Edge to pair with Microsoft Teams, the SBC FQDN domain name must match a name registered in both the Domains and DomainUrlMap fields of the Tenant. Verify the correct domain name is configured for the Tenant as follows:
Users may be from any SIP domain registered for the tenant. For example, you can configure user user@SonusMS01.com with the SBC FQDN name sbc1.hybridvoice.org, as long as both names are registered for the tenant.
The Certificate must be issued by one of the supported certification authorities (CAs). Wildcard certificates are supported.
Refer to Microsoft documentation for the supported CAs.
Ribbon recommends the deployment of the SBC Edge product behind a firewall, within the DMZ, regardless of the assignment of a public IP to the SBC in question. Refer to SBC Edge Security Hardening Checklist for more information about the SBC and firewalls.
This section lists the ports, protocols and services for firewalls that are in the path of the SBC connecting to Teams Direct Routing.
Assign a Static Public IP address on the media interface in Azure for Microsoft Teams Direct Routing.
Click the desired VM to be used for Microsoft Teams Direct Routing.
Under Settings, click Networking to open the media interface.
Click on the network interface.
Under Settings, click IP Configuration.
From the Public IP address settings option, select Enabled.
From the Choose public IP address window, click Create new.
From the Create public IP address window and the Assignment options, select Static.
Run the Easy Configuration Wizard to configure Microsoft Teams Direct Routing:
From the Application drop down box, select the relevant Easy Configuration wizard. Depending on your network, follow a relevant Easy Configuration wizard. Refer to the table below for guidance.
IP Routing must be customized in the SBC SWe Lite for Microsoft Teams Direct Routing in Azure. Two options are available for configuration:
When using multiple NICs on the SBC SWe Lite, Azure designates the first Network's Interface as the Primary Network Interface. Only the Primary Network Interface receives a network default gateway and routes via DHCP. To assign the Network Default Route on another Subnet, you must designate another Network's Interface as the Primary Network Interface.
To assign the network default route, refer to Change Azure Default Route.
Add a static route for the traffic to the following IP address and Mask: 52.112.0.0/14 (52.112.0.0/255.252.0.0).
For details on creating Static Routes, refer to Creating Entries in a Static IP Route Table.
Add the following Static Route using your media interface:
Destination IP: 52.112.0.0
Mask: 255.252.0.0
Gateway: 10.1.9.1
For details on IP Interfaces, refer to Managing Logical Interfaces
Ensure that all network interfaces are configured as follows:
DHCP Options to Use: IP Address and Default Route.
For troubleshooting steps, refer to Best Practice - Troubleshoot Issues with Microsoft Teams Direct Routing.
Place a test call as follows: Click OK. The test call is now complete. For troubleshooting steps, refer to Best Practice - Troubleshoot Issues with Microsoft Teams Direct Routing.