3CX is a software-based private branch exchange (PBX) that utilizes Voice over IP (VoIP) technology to manage and route calls. It is a powerful tool for businesses looking to streamline their communication systems. This article will guide you through the process of installing and configuring 3CX on a Windows server, making the most of its features in a Windows environment.

Examples:

1. System Requirements and Preparation: Before starting, ensure your Windows server meets the minimum requirements:

   • Windows 10, Windows Server 2016, or later.
   • At least 2 GB of RAM and 2 CPU cores.
   • A static IP address.
   • Internet connection for updates and remote access.

2. Downloading and Installing 3CX:

   • Visit the official 3CX website and download the Windows installer.
   • Run the installer and follow the on-screen instructions.

   Example command to start the installer via CMD:

   start /wait 3CXInstaller.exe

3. Initial Configuration:

   • After installation, open the 3CX Management Console from the Start Menu.
   • Follow the setup wizard to configure the basic settings, such as:
     • Select the installation type (local or cloud).
     • Set the admin username and password.
     • Configure the network settings (static IP, DNS).

4. Firewall Configuration: Ensure that the necessary ports are open on your Windows Firewall. You can use PowerShell to open the required ports:

   New-NetFirewallRule -DisplayName "3CX SIP" -Direction Inbound -Protocol UDP -LocalPort 5060 -Action Allow
   New-NetFirewallRule -DisplayName "3CX RTP" -Direction Inbound -Protocol UDP -LocalPort 9000-10999 -Action Allow

5. Creating Extensions:

   • In the 3CX Management Console, navigate to "Extensions" and click "Add."
   • Fill in the necessary details for the new extension, such as the extension number, name, and email address.

6. Configuring VoIP Providers:

   • Go to "SIP Trunks" in the Management Console and click "Add SIP Trunk."
   • Select your VoIP provider from the list and enter the required credentials and settings.

7. Testing the Configuration:

   • Use a softphone application like 3CX Phone for Windows to register an extension.
   • Make test calls to ensure everything is configured correctly.