In this section:
Overview
The SBC Edge is certified to offer Microsoft Teams Direct Routing services, and 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 connect the SBC Edge for Enterprise's migration from Skype for Business (SfB) On Premises to Microsoft Phone System (Teams).
Network Topology - Skype for Business Server On-Premises Migration to Microsoft Phone System (Teams) Deployment
An enterprise may choose to deploy Teams Phone System services to clients using Skype for Business Server on-premises enterprise voice services. Two migrations scenarios exist:
- Uniquely On-Premises deployment only
- Hybrid On-Premises deployment
Pre-Migration Uniquely On-Premises Deployment
All Skype for Business clients are homed to the On-Premises Skype for Business Server for voice services. No cloud-based VoIP services from Microsoft are used. A Ribbon SBC Edge device qualified for Skype for Business is deployed on the customer premises to support connectivity with the PSTN and legacy clients.
Enterprise Voice Network with Skype for Business Server On-Premises Services, Before Teams Direct Routing Migration
NOTE: The Ribbon SBC may be also deployed in an enterprise branch office and may feature a Skype for Business Survivable Branch Appliance (SBA) application (not shown).
Pre-Migration Hybrid On-Premises Deployment
Skype for Business clients are homed to the Cloud PBX for voice services. No CCE is deployed; the Skype for Business Server provides services analogous to those provided by the CCE. A Ribbon SBC Edge device qualified for Skype for Business and the Skype for Business Server (deployed on premises) to support connectivity with the PSTN and legacy clients.
Enterprise Voice Network with "Hybrid" Skype for Business Server On-Premises Services, Before Teams Direct Routing Migration
Post Migration - Hybrid and Uniquely On Premises Deployment
Following configuration, the Ribbon SBC Edge device offers certified Teams Phone System Direct Routing services to enterprise clients.
Enterprise Voice Network After Migration to Teams Direct Routing, Away From Skype for Business Server
Step 1: Install SBC Edge
These instructions assume the SBC Edge product (SBC SWe Lite, SBC 1000/2000) is installed and running. If the product is not installed, refer to the links below. Installation Requirements On KVM: Installing SBC SWe Lite on KVM Hypervisor
Product Installation SBC SWe Lite SBC 1000 Installing the SBC 1000 Hardware SBC 2000
Step 2: Review Prerequisites for Microsoft Teams Direct Routing
Microsoft Teams Direct Routing Configuration
Consult the Microsoft documentation for detailed information on Direct Routing interface configuration guidelines, including the RFC standards and the syntax of SIP messages.
SBC Edge Software
Ensure you are running the latest version of SBC software:
- To locate the SBC Edge software current running, refer to: Viewing the Software Version and Hardware ID.
- To download and upgrade a new version of SBC Edge software, refer to: Installing and Commissioning the SBC Edge and SBC SWe Lite.
Obtain IP Address and FQDN
Requirements for configuring the SBC Edge in support of Teams Direct Routing include:
SBC Edge Requirements
| Requirement | How it is Used |
|---|---|
Public IP address of NAT device (must be Static)* Private IP address of the SBC | Required for SBC Behind the NAT deployment. |
| Public IP address of SBC | Required for SBC with Public IP deployment. |
| Public FQDN | The Public FQDN must point to the Public IP Address. |
*NAT translates a public IP address to a Private IP address.
Domain Name
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:
- On the Microsoft Teams Tenant side, execute Get-CsTenant.
- Review the output.
- Verify that the Domain Name configured is listed in the Domains and DomainUrlMap attributes for the Tenant. If the Domain Name is incorrect or missing, the SBC will not pair with Microsoft Teams.
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.
Domain Name Examples
| Domain Name* | Use for SBC FQDN? | FQDN Names - Examples |
|---|---|---|
| SonusMS01.com |  | Valid names:
|
hybridvoice.org | | Valid names:
Non-Valid name: sbc1.europe.hybridvoice.org (requires registering domain name europe. hybridvoice.org in “Domains” first) |
*Do not use the *.onmicrosoft.com tenant for the domain name.
Configure Domain Names - Example
Obtain Certificate
Public Certificate
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.
- Refer to Domain Name for certificate formats.
Configure and Generate Certificates on the SBC
Warning: Common Encryption Certificate Issues Arise from Missing Root Certificates
- Did you only install the CA-signed SBC certificate, along with the intermediate certificate(s) sent by your issuing CA?
- Did you get the following error message from the SBC?
If so, the likely reason is a missing CA Root Certificate. The SBC does not have any pre-installed CA root X.509 certificates, unlike typical browsers found on your PC. Ensure the entire certificate chain of trust is installed on the SBC, including the root certificate. Acquire the CA root certificate as follows:
- Contact your system administrator or certificate vendor to acquire the root, and any further missing intermediate certificate(s) to provision the entire certificate chain of trust within the SBC;
- Load the root certificate, along with the intermediate and SBC certificates, according to Importing Trusted Root CA Certificates.
NOTE: Root certificates are easily acquired from the certificate authorities. For example, the root certificate for the GoDaddy Class 2 Certification Authority may be found at https://ssl-ccp.godaddy.com/repository?origin=CALLISTO . For more information about root certificates, intermediate certificates, and the SBC server (“leaf”) certificates, refer to this tutorial.
For other certificate-related errors, refer to Common Troubleshooting Issues with Certificates in SBC Edge.
Microsoft Teams Direct Routing allows only TLS connections from the SBC for SIP traffic with a certificate signed by one of the trusted certification authorities.
Request a certificate for the SBC External interface and configure it based on the example using GlobalSign as follows:
- Generate a Certificate Signing Request (CSR) and obtain the certificate from a supported Certification Authority.
- Import the Public CA Root/Intermediate Certificate on the SBC.
- Import the Microsoft CA Certificate on the SBC.
- Import the SBC Certificate.
The certificate is obtained through the Certificate Signing Request (instructions below). The Trusted Root and Intermediary Signing Certificates are obtained from your certification authority.
Step 1: Generate a Certificate Signing Request and obtain the certificate from a supported Certification Authority (CA)
Many CA's do not support a private key with a length of 1024 bits. Validate with your CA requirements and select the appropriate length of the key.
- Access the WebUI.
- Access Settings > Security > SBC Certificates.
Click Generate SBC Edge CSR.
Enter data in the required fields.
Click OK. After the Certificate Signing request finishes generating, copy the result to the clipboard.
Generate Certificate Signing Request
- Use the generated CSR text from the clipboard to obtain the certificate.
Step 2: Deploy the SBC and Root/Intermediate Certificates on the SBC
After receiving the certificates from the certification authority, install the SBC Certificate and Root/Intermediate Certificates as follows:
- Obtain Trusted Root and Intermediary signing certificates from your certification authority.
- Access the WebUI.
- To install Trusted Root Certificates, click Settings > Security > SBC Certificates > Trusted Root Certificates.
- Click Import and select the trusted root certificates.
- To install the SBC certificate, open Settings > Security > SBC Certificates > SBC Edge Certificate.
Validate the certificate is installed correctly.
Validate Certificate
- Click Import and select X.509 Signed Certificate.
Validate the certificate is installed correctly.
Validate Certificate
Firewall Rules
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.
Basic Firewall Rules for All Call Flows
Firewall Rules for the SBC with Media Bypass
Step 3: Configure Direct Routing from Skype for Business Server On-Premises
These instructions configure the Tenant to connect (pair) the SBC to the Microsoft Direct Routing Interface.
- Access PowerShell. Refer to the PowerShell documentation.
- Connect to the Tenant via Powershell.
Configure the Microsoft Phone system Voice routing. As part of this process, use the following command to create an Online PSTN Gateway that points to the SBC:
New-CsOnlinePSTNGateway -Fqdn <SBC FQDN> -SipSignallingPort <SBC SIP Port> -MaxConcurrentSessions <Max Concurrent Session which SBC capable handling> -Enabled $true
Configure the Teams usage for the user:
Get-CsOnlineUser -Identity user1@domain.com 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 TCP and TLS between SBC Edge and Skype for Business Server
For configuring TCP and TLS between the SBC Edge and Skype for Business server, there are two migration types:
- Migration from Hybrid On-Premises Deployment
- Migration from Uniquely On-Premises Deployment
See below for which migration applies to your network.
Migration from Hybrid On-Premises Deployments
These instructions apply to enterprises with a Hybrid On-Premises for Skype for Business on-premises deployment.
Using TCP between SBC and Skype for Business Server
Follow instructions posted below for basic Teams configuration (Step 5).
For a successful migration, if the SBC is deployed with a private FQDN into Skype for Business On-Premises, do not change the SBC Hostname and Domain. Use the Public FQDN on the new SIP profile only.
Using TLS between SBC and Skype for Business Server
For SBC Using Publicly-Owned Domain Name
Follow instructions posted below for basic Teams configuration (Step 5).
If the SBC is deployed with a private FQDN in the Skype for Business Server, do not change the SBC Hostname and Domain. Use the Public FQDN on the new SIP profile only.
For SBC Using Non-Owned Public Domain Name
CautionOne TLS port can be attached to only one TLS profile. If your SfB deployment uses TLS 5061 as the Federated port, you must modify this Federated port to use a port other than 5061. To modify the Federated port, you must update the Online PSTN Gateway of the SfB On-Premise topology and the Federated port of the SfB signaling group.
If you cannot modify your SfB On-Premise topology, you can modify the port that Microsoft Teams Direct Routing uses. Make sure you update the Firewall, ACL, and Federated port of the Teams Signaling Group and Online PSTN Gateway.
For a domain name not owned by the enterprise:
Update the SBC FQDN to a public FQDN.
Update the SBC entry in the Skype for Business On-Premise topology.
Load a public certificate onto the SBC that covers the public FQDN.
Configure via Basic SBC Edge Configuration via Step 5.
Migration from Uniquely On-Premises Deployments
These instructions apply to enterprises with a Uniquely On-Premises for Skype for Business Server deployment.
Enable split domain. For details, refer to: Configure Hybrid connectivity between Skype for Business Server and Office 365.
Move On-Premises users to Skype Online. For details, refer to: Move users between On-Premises and Cloud.
Follow the process related to hybrid on premises deployments as described Migrations from Hybrid On-Premises Deployments.
Step 5: Configure SBC Edge for Microsoft Teams Direct Routing
These instructions assume the SBC Edge is installed and running, and is connected to the WebUI.
For the purposes of this documentation, the screens displayed are for an SBC 1000/2000; the interface configuration may vary slightly for the SBC SWe Lite. If configuration is not specified for a field, use the default value.
Access the SBC Edge WebUI
Access the WebUI. Refer to Logging into the SBC Edge.
Configure TLS Profile
The TLS profile defines the crypto parameters for the SIP protocol; it is used as the transport type for incoming and outgoing SIP trunks.
Configure a TLS profile as follows:
- In the WebUI, click the Settings tab.
In the left navigation pane, go to Security > TLS Profiles.
- Click the Create TLS Profile (
) icon at the top of the TLS Profile page. The Create TLS Profile page is displayed. Configure the parameters as shown below (example values are shown in the table; configure as per your network requirements). For details on field descriptions, refer to Creating and Modifying TLS Profiles.
Leave all other parameters as default.
Click OK.
TLS Configuration - Example Values
Parameter Example Value Description Teams Direct Routing TLS TLS Protocol TLS 1.2 Only Client Cipher List Select at least one of the following Microsoft/Ribbon common cyphers must be configured:
- TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
- TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
Validate Client FQDN Disabled TLS - Example
Configure Host Information and DNS
The Host Information and DNS configuration contains system information that is used by the SBC Edge, including host, domain, and NTP server information.
- In the WebUI, click the Settings tab.
In the left navigation page, access System > Node-Level Settings. The Node-Level Settings page is displayed.
Configure the NTP and DNS Servers with network-specific data.
Leave all other parameters as default.
Click Apply.
TLS Configuration - Example Values
Parameter Example Value Host Name aepsite6 Domain Name SonusMS01.com Use NTP Yes NTP Server Specifies the FQDN, IPv4, or IPv6 address of the NTP server. If the host name is supplied, the SBC uses the DNS to connect to the NTP server. Use Primary DNS Yes Primary Server IP XXX.XXX.XX.XXX Node-level Settings - Example
Configure Logical Interface
The SBC Edge supports system-supported Logical Interfaces, which are used to hold the IP address for each Ethernet port. One of these logical interfaces is assigned an IP address for transporting the VoIP media packets (i.e., RTP, SRTP) and protocol packets (i.e, SIP, RTCP, TLS). In this example, Ethernet 1 is configured for transporting packets for the Microsoft Teams Direct Routing connection.
Ensure the IP Routing Table contains the same information as in the network topology.
- In the WebUI, click the Settings tab.
In the left navigation pane, go to Node Interfaces > Logical Interfaces.
Configure the parameters as shown below (example values are shown in the table; configure as per your network requirements). For details on field descriptions, refer to Configuring and Modifying Logical Interfaces.
- Leave all other parameters as default.
Click Apply.
Logical Interfaces Configuration - Example Values
Parameter Example Value Alias To Microsoft Phone 5 Description
Interface to Interconnect with Microsoft Phone System
Admin Interface
Enable
IP Assign Method
Static
Primary Address
<Public IP of your SBC> (in the example 192.168.211.80)
Primary Netmask
<Mask of Public Interface of your SBC> (in the example 255.255.255.0)
Logical Interfaces - Example
Create SIP Profile
The SIP Profile controls how the SBC Edge communicates with SIP devices; the profile controls important characteristics such as: session timers, SIP header customization (including FQDN), SIP timers, MIME payloads, and option tags .A SIP Profile also defines which FQDN (Fully Qualified Domain Name) is used in the Contact Header and From Headers. For interconnecting with Microsoft System Direct Routing, two SIP Profiles are required:
- Teams Direct Routing Profile
- SIP Trunk Profile
Create Teams Direct Routing Profile
Create a SIP Profile for the Teams Direct Routing Profile as follows:
- In the WebUI, click the Settings tab.
- In the left navigation page, access SIP > SIP Profiles.
Click the (
) icon at the top of left corner and add a new SIP profile.Configure the parameters as shown below (example values are shown in the table; configure as per your network requirements). For details on field descriptions, refer to Creating and Modifying SIP Profiles.
Leave all other parameters as default.
Click OK.
SIP Profile Configuration - Example Values
Parameter
Example Value
Description
Teams Direct Routing Profile
FQDN in From Header
SBC Edge FQDN
FQDN In Contact Header
SBC FQDN
NOTE: For Microsoft Teams, the Signaling Group facing the Teams server must be configured as SBC Edge FQDN or Static (if there is more than one signaling group connected to Teams Direct Routing). The FQDN in Contact Header should be the same FQDN used in Office 365 Tenant Online Gateway. If the IP Address of the SBC is configured in the Contact Header instead of the FQDN of the SBC, a Forbidden message is received.
Origin Field Username
<FQDN of SBC> (in the example aepsite6.SonusMS01.com)
SIP Profile - Example
Create SIP Trunk Profile
Create a SIP Profile for the SBC Edge's SIP Trunk as follows:
- In the WebUI, click the Settings tab.
- In the left navigation page, access SIP > SIP Profiles.
Click the (
) icon at the top of left corner and add a new SIP profile.Configure the parameters as shown below (example values are shown in the table; configure as per your network requirements). For details on field descriptions, refer to Creating and Modifying SIP Profiles.
Leave all other parameters as default.
Click OK.
SIP Profile Configuration - Example Values
Parameter
Example Value
Description
SIP Trunk Profile
FQDN in From Header
Disable
FQDN In Contact Header
Disable Origin Field Username SBC SIP Profile - Example
Create SDES-SRTP Profile
The SDES-SRTP Profile defines the encryption mechanism used between the SBC and the Microsoft Teams Direct Routing interface; the Crypto Suite specifies the algorithm used to negotiate with a peer device.
Create a SDES-SRTP Profile as follows:
- In the WebUI, click the Settings tab.
- In the left navigation page, access Media > SDES-SRTP.
- Click the ( ) icon at the top left corner and add a new SDES-SRTP Profile.
Configure the parameters as shown below. For details on field descriptions, refer to Creating and Modifying SIP Profiles.
Leave all other parameters as default.
Media Crypto Profile Configuration - Example Values
Parameter
Example Value
Description
Teams Direct Routing SRTP
Operation Option
Required
Crypto Suite
AES_CM_128_HMAC_SHA1_80
Media Crypto Profile - Example
Create Media List
The Media List contains one or more of Media Profiles, which the SBC Edge uses for call transmission. A Media Profile specifies the individual voice codecs the SBC Edge uses for voice compression, voice quality, and associated settings.
Create a Media List for Teams Direct Routing as follows:
- In the WebUI, click the Settings tab.
- In the left navigation page, access Media > Media List.
- Click the ( ) icon at the top left corner and add a new Media List.
Configure parameters as shown below. For details on field descriptions, refer to Creating and Modifying Media Lists.
Leave all other parameters as default.
Media List Configuration - Example Values
Parameter
Example Value
Description
Teams Direct Routing Media List
Media Profiles List
In the Media Profiles List field, click Add/Edit. G711a and G711u are the default Media Profiles.
- G711a
- G711u
NOTE: See Microsoft documentation for the list of codecs supported by Microsoft.
SDES-SRTP Profile
Teams Direct Routing SRTP. This profile was created in the previous step.
Media List - Example
Configure a SIP Server Table
SIP server tables define the information for the SIP interfaces connected to the SBC Edge; a SIP Server Table is required to support the Microsoft Phone System. For interconnecting with Microsoft System Direct Routing, two SIP Profiles are required:
- Teams Direct Routing Server
- SIP Trunk Server
Create a Teams Direct Routing Server
- In the WebUI, click the Settings tab.
- In the left navigation page, access SIP > SIP Server Tables
Click the (
) icon at the top left corner and add a new SIP Server Table.- For Description, enter Teams Direct Routing Server.
Click OK.
Create SIP Server Table
Configure Entries in the Teams Direct Routing Server
The information you configure in the SIP Server table pairs the SBC Edge to the Microsoft Teams Direct Routing interface. Three entries in the SIP Server table offer server redundancy to ensure a server is always up and communicating. If a server is down or not communicating, the SBC Edge will automatically move to the next Server entry on the list.
Configure Teams Direct Routing Server entries as follows:
- In the WebUI, click the Settings tab.
- In the left navigation page, access SIP > SIP Server Tables.
- Select the name of the table created in the previous step.
- From the Create SIP Server drop down list, select IP/FQDN.
Repeat this configuration for two additional SIP Server entries, using the field entries below. For details on field descriptions, refer to Creating and Modifying Entries in SIP Server Tables.
SIP Server 1 Table - Example Values
Parameter
Value
Priority
1
Host
sip.pstnhub.microsoft.com
Port
5061
Protocol
TLS
TLS Profile
Teams Direct Routing TLS
Monitor
SIP Options
SIP Server 1 - Example Values
SIP Server 2 Table - Example Values
Parameter
Value
Priority
2
Host
sip2.pstnhub.microsoft.com
Port
5061
Protocol
TLS
TLS Profile
Teams Direct Routing TLS
Monitor
SIP Options
SIP Server 2 - Example Values
SIP Server 3 Table - Example Values
Parameter
Value
Priority
3
Host
sip3.pstnhub.microsoft.com
Port
5061
Protocol
TLS
TLS Profile
Microsoft Phone System
Monitor
SIP Options
SIP Server 3 - Example Values
Create a SIP Trunk Server
- In the WebUI, click the Settings tab.
- In the left navigation page, access SIP > SIP Server Tables
Click the (
) icon at the top left corner and add a new SIP Server Table.- For Description, enter SIP Trunk Server.
Click OK.
Create SIP Server Table
Configure an Entry in the SIP Trunk Server
Configure a SIP Trunk Server entry as follows:
- In the WebUI, click the Settings tab.
- In the left navigation page, access SIP > SIP Server Tables.
- Select the name of the table created in the previous step.
- From the Create SIP Server drop down list, select IP/FQDN.
Leave the remaining fields as default. For details on field descriptions, refer to Creating and Modifying Entries in SIP Server Tables.
Click OK.
SIP Trunk Server - Example Values
Parameter
Value
Priority
1
Host
Host FQDN for SBC
Port
5060
Protocol
UDP
Monitor
None
SIP Trunk Server - Example Values
Create Transformation Table and Entries
This Transformation Table contains a list of call routes that include routing configuration for calls from Microsoft Teams and SIP Trunk. Two Transformation tables are required:
- For Calls from Microsoft Teams
- For Calls from SBC's SIP Trunk
Calls From Microsoft Teams to SBC's SIP Trunk
This Transformation Table contains a list of call routes that include routing configuration for calls from Microsoft Teams to SBC's SIP Trunk.
- In the WebUI, click the Settings tab.
- In the left navigation page, access Call Routing > Transformation
Click the (
) icon at the top left corner to add a new Transformation Table.- For Description, enter From Microsoft Teams
Click OK.
Create Transformation Table
In the left navigation panel, select the new table: Transformation > From Microsoft Teams: Passthrough.
Click the Create (
) icon.- Configure the parameters as shown below. Leave the default values for all other parameters.
Click OK.
Transformation Entries - Example Values
Parameter
Value
Description From Microsoft Teams: Passthrough Match Type Mandatory (Must Match) Input Field Type: Called Address/Number
Value: (.*)Output Field Type: Called Address Number
Value: \1Transformation Entry - Example
Transformation Table - Entry Added
Calls From SBC's SIP Trunk to Microsoft Teams
This Transformation Table contains a list of call routes that include routing configuration for calls from the SBC's SIP Trunk to Microsoft Teams.
- In the WebUI, click the Settings tab.
- In the left navigation page, access Call Routing> Transformation
Click the (
) icon at the top left corner to add a new Transformation Table.- For Description, enter From SIP Trunk.
Click OK.
Create Transformation Table
In the left navigation panel, select the new table: Transformation > From SIP Trunk: Passthrough.
Click the Create (
) icon.- Configure the parameters as shown below. Leave the default values for all other parameters.
Click OK.
Transformation Entries - Example Values
Parameter
Value
Description
From SIP Trunk: Passthrough
Match Type
Mandatory (Must Match)
Input Field
Type: Called Address/Number
Value: (.*)
Output Field
Type: Called Address Number
Value: \1
Transformation Table Entry
Transformation Table - Entry Added
Create Signaling Groups
Signaling groups allow telephony channels to be grouped together for the purposes of routing and shared configuration. In the case of SIP, they specify protocol settings and link to server, media and mapping tables. For Teams Direct Routing, you configure the Signaling Group to designate routing information for calls between SBC Edge and the Microsoft Phone System. Two Signaling Groups are required:
- Signaling Group - Calls from Microsoft Teams to SBC's SIP Trunk
- Signaling Group - Calls from SBC's SIP Trunk to Microsoft Teams
Calls From Microsoft Teams to SBC's SIP Trunk
- In the WebUI, click the Settings tab.
- In the left navigation page, access Signaling Groups
From the Create Signaling Group drop down box, select SIP Signaling Group.
- Configure the parameters as shown below. Leave the default values for all other parameters.
Click OK.
Signaling Group Configuration - Example Values
Parameter
Value
Description
From Microsoft Teams
SIP Profile
Teams Direct Routing Profile
Media List ID
Team Direct Routing List
Signaling Media/Private IP
Ethernet 1 (example, choose the interface which faces Microsoft Teams Direct Routing)
Listen Port
5061 TLS
Federated IP/FQDN
sip-all.pstnhub.microsoft.com
SIP server table
Teams Direct Routing Server
Load Balancing
Priority: Register All
SIP Profile
Microsoft Phone System (from previous step)
Call Routing Table
Default
Outbound NAT Traversal* Static NAT NAT Public IP*
IP Address (Only required if “Static NAT” is selected)
Static NAT Inbound Disabled (this field should not be configured for Non-Media Bypass Teams deployment) *Outbound NAT Traversal and the NAT Public IP is required when the SBC is behind a NAT (the public IP address of the NAT device is required when the SBC has a Private IP).Signaling Group - Example
Calls from SBC's SIP Trunk to Microsoft Teams
- In the WebUI, click the Settings tab.
- In the left navigation page, access Signaling Groups
From the Create Signaling Group drop down box, select SIP Signaling Group.
Configure the parameters as shown below. Leave the default values for all other parameters.
Click OK.
Signaling Group Configuration - Example Values
Parameter
Value
Description
From SIP Trunk
SIP Profile
SIP Trunk
Media List ID
SIP Trunk List
Signaling Media/Source IP
Ethernet 2 (example, choose the interface which faces the SIP Trunk)
Listen Port
5060 UDP
Federated IP/FQDN
IP Address SIP Server table
SIP Trunk Server
Load Balancing
Round Robin
SIP Profile
SIP Trunk
Call Routing Table
Default
Outbound NAT Traversal* None NAT Public IP*
IP Address (Only required if “Static NAT” is selected)
Static NAT Inbound Disabled (this field should not be configured for Non-Media Bypass Teams deployment) *Outbound NAT Traversal and the NAT Public IP is required when the SBC is behind a NAT (the public IP address of the NAT device is required when the SBC has a Private IP).
Signaling Group - Example
Create Call Routing Tables
Two Call Routing Tables for transporting calls between the SBC's SIP Trunk and Microsoft Teams are required:
- Call Route - Calls from Microsoft Teams to SBC's SIP Trunk
- Call Route - Calls from the SBC's SIP Trunk to Microsoft Teams
From Microsoft Teams to SBC's SIP Trunk
This Call Routing Table routes calls from Microsoft Teams.
- In the WebUI, click the Settings tab.
- In the left navigation page, access Call Routing Table.
Click the (
) icon at the top left corner and add a new Call Routing Table.Create Call Routing Table
Configure the Description as From Microsoft Teams and click OK.
From the left navigation pane, click on the Call Routing > Call Routing table.
Select From Microsoft Teams (the entry you just created).
- Click the ().
Configure the parameters as shown below. Leave all other parameters as default.
Click OK.
Call Routing Table Configuration - Example
Parameter
Value
Description
To SIP Trunk (Passthrough)
Number/Name Transformation Table
From Microsoft Teams: Passthrough (select Transformation Table you created above)
Destination Signaling Groups
Choose the Signaling Group of a local equipment.
Call Routing Table - Example
From SBC's SIP Trunk to Microsoft Teams
This Call Routing Table routes calls from the SBC's SIP Trunk and sent to Microsoft Teams.
To add and configure a new Call Routing Table:
- In the WebUI, click the Settings tab.
- In the left navigation page, access Call Routing Table.
Click the (
) icon at the top of left corner and add a new Call Routing Table.Create Call Routing Table
Configure the Description as Microsoft Phone system and click OK.
From the left navigation pane, click on the Call Routing > Call Routing table.
Select From SIP Trunk (the entry you just created).
- Click the ().
Configure the parameters as shown below. Leave all other parameters as default.
Click OK.
Call Routing Table Configuration - Example
Parameter
Value
Description
To Microsoft Teams (Passthrough)
Number/Name Transformation Table
From SIP Trunk: Passthrough (select Transformation Table you created above)
Destination Signaling Groups
Choose the Signaling Group for Microsoft Teams Direct Routing
Call Routing Table - Example
Update Signaling Groups for Call Route
The newly created Call Route must be associated to a Signaling Group as follows:
Associate Call Route to Signaling Group for Calls From Teams to SBC's SIP Trunk
- In the WebUI, click the Settings tab.
- In the left navigation page, access Signaling Groups > Teams Direct Routing.
- From the Call Routing Drop down list, select From Microsoft Teams.
Click OK.
Select Call Routing Table - Teams Direct Routing
Associate Call Route to Signaling Group for Calls from SBC's SIP Trunk to Teams
- In the WebUI, click the Settings tab.
- In the left navigation page, access Signaling Groups > SIP Trunk.
- From the Call Routing Drop down list, select From SIP Trunk.
Click OK.
Select Call Routing Table - From SIP Trunk
Step 6: Configure SBC Edge when Microsoft Teams is in Media Bypass Mode
Non-Media Bypass vs. Media Bypass Deployment
Non-Media Bypass
Non-Media Bypass is Microsoft Teams Direct Routing related deployment where all media flows between Teams clients in the enterprise and the SBC transit the Teams Phone System based in the Azure cloud.
Teams Direct Routing - Without Media Bypass
Media Bypass
Media Bypass is a Microsoft Teams Direct Routing deployment where all media flows between Teams clients in the enterprise connect directly to the SBC without transiting the Teams Phone System.
If Microsoft Teams is in Media Bypass mode, you must configure the SBC Edge as detailed in this section (if Microsoft Teams is not in Media Bypass mode, this configuration is not required).
For Media Bypass, the following is supported:
- Deployment on a Public IP address
- Deployment behind NAT
Configure Signaling Group
Before configuring Outbound NAT Traversal, obtain the Public IP address for your network (the Public IP address specified in the screen graphic is an example only); configuration for NAT is required only if deployment is behind NAT.
- In the WebUI, click the Settings tab.
- In the left navigation page, access Signaling Groups
From the Create Signaling Group drop down box, select SIP Signaling Group.
Configure the parameters as shown below. Leave the default values for all other parameters.
Click OK.
Signaling Group Configuration - Example Values
Parameter
Value
RTCP Multiplexing Enable ICE Support Enabled ICE Mode Lite Outbound NAT Traversal* Static NAT NAT Public IP (Signaling/Media)* Public Address for the NAT device assigned on the media port for your network Static NAT Inbound Disabled (this field should not be configured for Media Bypass Teams deployment) *Outbound NAT Traversal and the NAT Public IP is required when the SBC is behind a NAT (the public IP address of the NAT device is required when the SBC has a Private IP).
The peer endpoint must support the a=rtcp-mux exchange in order for the RTP and RTCP ports to be multiplexed into one data port.
SIP Signaling Group - Example
Step 7: Confirm the Configuration
Validate SIP Option
- In the WebUI, click the Settings tab.
- In the left navigation pane, access Signaling Groups.
- For the signaling group configured for Microsoft Teams Direct Routing, click Counters.
- Confirm the number of Incoming and Outgoing SIP Options.
- Confirm the number of Incoming and Outgoing 2xx responses.
Incoming and Outgoing Counters
Step 8: Place a Test Call
Place a test call as follows: Access the WebUI. Refer to Logging into the SBC Edge. In the WebUI, click the Diagnostics tab. In the left navigation pane, click Test a Call. Configure the parameters as shown below. Click OK. Place a Test Call - Parameters Parameter Value Destination Number Number assigned to a Teams user. Origination/Calling Number Number assigned to a Local user. Call Routing Table The routing table that handles the call from Microsoft Teams. Test a Call - Configuration Place a Test Call - Example The test call is now complete. For troubleshooting steps, refer to Best Practice - Troubleshoot Issues with Microsoft Teams Direct Routing.
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