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Overview

The SBC Edge is certified to offer Microsoft Teams Direct Routing services; the SBC Edge can be used to connect any Teams client to:

• A PSTN trunk, whether based on TDM (e.g. PRI, BRI, etc.), CAS, or SIP
• 3rd-party, non-Teams-certified SIP/TDM based PBXs, analog devices, and SIP clients

These instructions detail how to configure the SBC Edge (SBC 1000/2000 and SBC SWe Lite) to connect Microsoft Teams Direct Routing services deployed in an Enterprise network (On Premises).  For public cloud deployments, refer to Connect SBC SWe Lite to Microsoft Teams Direct Routing Deployed in Azure. The network diagram below displays the connection topology for Microsoft Teams Direct Routing deployed in an Enterprise network.

Step 1: Install SBC Edge

Step 2: Review Prerequisites for Microsoft Teams Direct Routing

Step 3: Configure Office 365 Tenant Voice Routing

A Tenant is used within the Microsoft environment as a single independent enterprise that has subscribed to Office 365 services; through this tenant, administrators can manage projects, users, and roles.  Access the Tenant configuration and configure as detailed below. (For details on accessing the Tenant, refer to Microsoft Teams Documentation).

1. Create Online PSTN Gateway that points to the SBC:

   1. Enter the SBC FQDN (Example below: aepsite6.SonusMS01.com). The FQDN must be configured for the Tenant in both the Domains and the DomainUrlMap fields.

   2. Enter the SBC SIP Port (Example below - SipPort5061).
      
      

   Code Block
   New-CsOnlinePSTNGateway -Fqdn aepsite6.SonusMS01.com -SipSignallingPort SipPort5061 -MaxConcurrentSessions <Max Concurrent Session which SBC capable handling> -Enabled $true

   
   

2. Configure Teams usage for the user:

   1. Enter the User Identity (Example below: -user1@domain.com)

Get-CsOnlineUser -Identity user1@domain.com Set-CsUser -Identity user1@domain.com -EnterpriseVoiceEnabled $true -HostedVoiceMail $true -OnPremLineURI tel:+10001001008 
Grant-CsOnlineVoiceRoutingPolicy -PolicyName "GeneralVRP" -Identity user1@domain.com 
Grant-CsTeamsCallingPolicy -PolicyName AllowCalling -Identity user1@domain.com 
Grant-CsTeamsUpgradePolicy -PolicyName UpgradeToTeams -Identity user1@domain.com

Step 4: Configure SBC Edge for Microsoft Teams Direct Routing

The SBC Edge is configured via Easy Configuration Wizard. 

1. Access the WebUI. Refer to Logging into the SBC Edge.
2. Click on the Tasks tab.
3. From the left side menu, click SBC Easy Setup > Easy Config Wizard.

4. 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.

   Caption
   0 Table 1 Easy Configuration - Microsoft Teams Direct Routing Configuration
   Deployment Type Refer to Configuration: SBC Connects to Microsoft Teams via SIP Trunk SIP trunks ↔ Microsoft Phone System Direct Routing SBC Connects to Microsoft Teams via PSTN Provider through ISDN. ISDN PSTN ↔ Microsoft Phone System Direct Routing SBC connects to Microsoft Teams via IP PBX IP PBX ↔ Microsoft Phone System Direct Routing

   
   

5. For an SBC behind the NAT deployment only: In Step 2 of the Easy Configuration wizard, ensure the following is configured:
   
   1. From the Outbound NAT Traversal drop down list, select Enable. Allows the SBC to be placed behind a NAT device, and uses the IP of the NAT device for all outgoing messages.
   2. In the Public IP Address, enter the Public IP of the NAT device. The SBC uses this IP as the source IP for all the outgoing messages.

6. The Configuration Wizard is complete.

   Info

   For the SBC 1000/SBC 2000 only: By default, when configuring the SBC with Easy Configuration, the default Ethernet Interface for Border Element (PSTN Endpoint) is configured as Auto. Ribbon recommends changing this configuration manually to the Ethernet port that points to the SIP Trunk side. For instructions on changing the Ethernet interface, refer to: Configuring and Modifying Logical Interfaces.

   
   

Step 5: Confirm SBC Edge Links to Microsoft Teams

Step 6: Place a Test Call