Best Practice - Configuring Carriers for Microsoft Teams Direct Routing

Overview

These instructions detail how to configure Teams Direct Routing with a Carrier.

For the Carrier DNS and Customer Tenant configuration, refer to the Microsoft configuration guide.

Configure the Office 365 Tenant

Configure the Office 365 Tenant with the following parameters:

Configure the Office 365 Tenant for each new Client

Configure the Office 365 Tenant for each new client with the following parameters:

Configure the SBC for each new Client

For SBC deployment with Teams Direct Routing, refer to Best Practice - Configuring SBC Edge for Microsoft Teams Direct Routing.

Configure the Carrier SBC for each new Client

Follow the instructions below to configure each carrier:

Configure SIP Profile

The SIP Profile enables configuration for parameters, such as SIP Header customization, option tags, etc.

1. In the WebUI, click the Settings tab.
2. In the left navigation pane, access SIP > SIP Profiles.

3. Click the (+) icon at the top of left corner and add a new SIP profile.

4. Configure parameters shown below:

   SIP Profile Configuration - Example Values

   Parameter	Example Value
   Description	Microsoft Phone System Customer 1
   FQDN in From Header	Static
   Static Host	<FQDN assigned to customer 1> customer1.mycarrier.com
   FQDN In Contact Header	Static
   Origin Field name	<FQDN assigned to customer 1> customer1.mycarrier.com

   SIP Profile Customer 1 - Example

    

Configure Signaling Group

1. In the WebUI, click the Settings tab.
2. In the left navigation page, access Signaling Groups.
   

3. From the Create Signaling Groupdrop down box, select SIP Signaling Group.

4. Configure the parameters as shown below. Leave the default values for all other parameters.

• Click OK.
  

  Signaling Group 1 Customer Configuration - Example Values

  Parameter	Example Value
  Description	Microsoft Phone System Customer 1
  SIP Profile	Microsoft Phone System Customer 1 (from the previous steps)
  Media List ID	Microsoft Phone System (from Microsoft Teams Direct Routing Best Practice)
  Signaling Media/Source IP	Ethernet 1 (example, pick the interface which faces the Microsoft Phone System)
  Listen Port	5061 (arbitrary port as assigned on the OnlinePSTNGateway) TLS TLS Profile ID: Microsoft Phone System (from Microsoft Teams Direct Routing Best Practice)
  Federated IP/FQDN	None
  SIP server table	Microsoft Phone System (from Microsoft Teams Direct Routing Best Practice)
  Load Balancing	Priority
  Call Routing Table	Microsoft Phone System (from Microsoft Teams Direct Routing Best Practice)
  Outbound NAT traversal*	Static NAT

  *Please ignore if the SBC has a Public IP assigned on the interface. The NAT Public IP is required only when the SBC is behind a NAT.
  
  
  

  Signaling Group Customer 1 - Example

   

Configure Transformation Table

1. In the WebUI, click the Settings tab.
2. In the left navigation page, access SIP > Transformation Tables.
   

3. Click the (+) icon at the top left corner to add a new Transformation Table.
   

4. Configure the parameters as shown below. 

   Transformation Table - Example Values

   Parameter	Example Value
   Row ID	Assigned by the system
   Description	Microsoft Phone System Customer 1(example name)

    

    

   Create Transformation Table

    

    

    

5. From the left navigation pane, click on the Transformation Table> Microsoft Phone System (the entry created in the last step).
6. Click the (+) icon.

7. Configure the parameters as shown below. Leave all other parameters as default.

8. Click OK. 

   Transformation Entry Customer 1 Configuration - Example

   Parameter	Example Value
   Description	To Microsoft Phone System Customer 1 (example name)
   Match Type	Mandatory
   Input Type	Called Address/Number
   Input Value	<Enter Customer 1 Phone Number > (\+151048512\d{2})
   Output Type	Called Address/Number
   Output Value	\1

   Transformation Entry Customer 1- Example

    

Configure Call Routing Table

To configure a new Call Routing Table:

1. In the WebUI, click the Settings tab.

2. From the left navigation pane, click on the Call Routing > From Carrier SIP Trunk.

3. Click the (+) icon.

4. Configure the parameters as shown below. Leave all other parameters as default.

5. Click OK. 

   Call Routing Customer 1 - Routing Table configuration

   Parameter	Example Value
   Description	From Microsoft Phone System Customer 1 (example name)
   Number/Name Transformation Table	Microsoft Phone System Customer 1
   Destination Signaling Groups	Microsoft Phone System Customer 1 (from the previous steps)

   Call Routing Table - Example

    

Known Issue

The SBC sends a SIP Option for each delegate trunk. To resolve this, create a new SIP Server table that contains an unmonitored SIP Server Entry. Side effect is, assuming Microsoft Teams goes down, this delegate SG will not go down.