Create integrate-express-route.md

Integrate ExpressRoute into existing Azure Communication Services solutions.

Author: vac0224

articles/communication-services/tutorials/integrate-express-route.md

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+---
+title: Integrate Azure Communication Services with ExpressRoute
+titleSuffix: An Azure Communication Services tutorial
+description: Integrate Azure Communication Services with ExpressRoute to extend your local networks into the Microsoft cloud over a private connection.
+author: hrazi
+manager: mharbut
+services: azure-communication-services
+
+ms.date: 02/01/2025
+ms.author: harazi
+ms.topic: conceptual 
+ms.service: azure-communication-services
+---
+
+# Integrate Azure Communication Services with ExpressRoute
+
+Azure Communication Services enables developers to integrate voice, video, chat, and SMS capabilities into their applications using cloud-based services. Organizations can use Azure ExpressRoute to establish private, dedicated network connections between their on-premises environments and Azure. This approach enhances the performance, reliability, and security of communication services. 
+
+This article describes how to integrate Azure Communication Services with ExpressRoute to extend your local networks into the Microsoft cloud over a private connection.
+
+## Prerequisites 
+
+- Azure Subscription: An active Azure account. If you don't have one, [create a free account](https://azure.microsoft.com/free/). 
+
+- ExpressRoute Circuit: A configured and operational ExpressRoute circuit. For setup instructions, see [Create and modify an ExpressRoute circuit](/azure/expressroute/expressroute-howto-circuit-portal-resource-manager). 
+
+- Azure Communication Services Resource: An instance of Azure Communication Services deployed in your Azure subscription. 
+
+- Network Connectivity: Proper network configurations to connect your on-premises environment to Azure via ExpressRoute.
+
+## Benefits of Using ExpressRoute with Azure Communication Services 
+
+- **Enhanced Security**: Bypass the public internet to reduce exposure to potential threats. 
+
+- **Improved Performance**: Experience lower latency and higher reliability for real-time communication. 
+
+- **Consistent Network Throughput**: Benefit from predictable network performance for mission-critical applications.
+
+## Configure ExpressRoute 
+
+### 1. Configure ExpressRoute for Microsoft Peering 
+
+To enable connectivity to Azure Communication Services, set up Microsoft Peering on your ExpressRoute circuit. 
+
+1. Access the Azure portal and navigate to your ExpressRoute circuit. 
+
+2. Enable Microsoft Peering: 
+
+   2.2. Under the Peerings section, select **+ Add**. 
+
+   2.2. Choose **Microsoft Peering** and provide the required information, including your Primary and Secondary Subnets, VLAN ID, and ASNs. 
+
+3. Advertise Routes: Make sure that your on-premises network advertises the appropriate routes to Azure services.
+
+For detailed instructions, see [Configure ExpressRoute Microsoft Peering](/azure/expressroute/how-to-routefilter-portal). 
+
+ ### 2. Apply route filters for Azure Communication Services 
+
+Route filters enable you to selectively consume services over ExpressRoute. 
+
+1. Create a route filter: 
+
+   1.1 In the Azure portal, search for route filters and select + Create. 
+
+   1.2. Provide a name, select your subscription and resource group. 
+
+2. Add Azure Communication Services to the route filter: 
+
+   2.1. After creating the route filter, select Rules and click + Add. 
+
+   2.2. Choose Azure Communication Services from the list of services. 
+
+3. Associate route filter with ExpressRoute Circuit: 
+
+   3.1. Navigate back to your ExpressRoute circuit. 
+
+   3.2. Under Peerings, select your Microsoft Peering. 
+
+   3.3. Associate the route filter you created. 
+
+For more information, see [Configure route filters for Microsoft Peering using Azure portal](/azure/expressroute/how-to-routefilter-portal). 
+
+### 3. Configure Network Security 
+
+Make sure that your network security policies permit traffic to and from Azure Communication Services. 
+
+   - Firewall rules: Update on-premises firewall settings to permit Azure Communication Services traffic. 
+
+   - Network Security Groups (NSGs): Configure NSGs in Azure to permit inbound and outbound communication with your on-premises network. 
+
+### 4. Verify Connectivity 
+
+- Ping test: From your on-premises environment, perform a ping test to the Azure Communication Services endpoints to verify connectivity. 
+
+- Trace route: Use `traceroute` tools to make sure traffic is routing through ExpressRoute. 
+
+### 5. Update Application Settings 
+
+- Endpoint configuration: Modify your application's configuration to point to the Azure Communication Services endpoints accessible via ExpressRoute. 
+
+- SDK settings: If using Azure Communication Services SDKs, ensure they're configured to use the private endpoints. 
+
+### Considerations 
+
+- Supported regions: Verify that Azure Communication Services is available in your desired region and supports ExpressRoute connectivity. 
+
+- Bandwidth requirements: Assess your bandwidth needs to ensure your ExpressRoute circuit can handle the communication load. 
+
+## Troubleshooting 
+
+- Connectivity Issues: If you can't connect to Azure Communication Services over ExpressRoute, verify your route filters and peering configurations. 
+
+- Authentication Failures: Ensure that your authentication tokens and keys for Azure Communication Services are correctly configured and not expired. 
+
+## Frequently Asked Questions 
+
+### Can I use ExpressRoute with Azure Communication Services for all communication modes? 
+
+No, ExpressRoute currently supports only voice mode by [Direct Routing](../concepts/telephony/direct-routing-provisioning.md) and [video communication](../concepts/voice-video-calling/calling-sdk-features.md) mode. 
+
+### Is there an added cost for using ExpressRoute with Azure Communication Services? 
+
+Not directly. While there's no added cost from Azure Communication Services for using ExpressRoute, there are costs associated with provisioning and using an ExpressRoute circuit. For more information, see [ExpressRoute pricing](/pricing/details/expressroute/). 
+
+### How does ExpressRoute affect the latency of communication services? 
+
+ExpressRoute provides [lower and more consistent latency compared to typical internet connections](/azure/expressroute/expressroute-faqs#what-are-the-benefits-of-using-expressroute-and-private-network-connections), which can enhance the performance of real-time communication applications.
+
+## Related articles
+
+- [Azure Communication Services Overview](../overview.md) 
+- [What is Azure ExpressRoute](/azure/expressroute/expressroute-introduction)
+- [Azure Communication Services Network recommendations](../concepts/voice-video-calling/network-requirements.md)