3cx system requirement

In the fast-paced world of business communications, 3CX stands out as a robust and versatile phone system, widely acclaimed for its efficiency and adaptability. Particularly for Canadian enterprises, 3CX offers a tailored communication solution that promises not just connectivity but also scalability and reliability.  

Understanding the intricacies of 3CX’s system requirements and hardware specifications is not just beneficial—it’s crucial for ensuring that your business leverages this technology to its fullest potential. 

Understanding 3CX System Requirements 

At the heart of a successful 3CX deployment lies a clear understanding of its system requirements. These prerequisites are the bedrock upon which the seamless operation of your 3CX phone system rests.  

They encompass a range of specifications, from software and hardware to network requirements, each playing a pivotal role in the system’s overall performance. 

Detailed System Requirements 

The scale of your business operation directly influences the 3CX system requirements. Here’s a breakdown tailored to different business sizes: 

  • Small Businesses: For startups or small teams, a modest setup suffices. A dedicated server or a cloud instance with minimal specifications can effectively cater to your needs, providing a cost-effective yet scalable solution. 
  • Medium-Sized Enterprises: As your business expands, so do your communication demands. A more robust setup, possibly involving multiple servers or higher-tier cloud instances, ensures that your growing team stays connected without a hitch. 
  • Large Enterprises: For large-scale operations, high-performance servers with advanced specifications are non-negotiable. Redundancy, high availability, and extensive scalability become key considerations to support a vast number of simultaneous calls and advanced features like video conferencing. 

Hardware Specifications for 3CX 

Diving deeper into the hardware landscape, the following components are crucial: 

  • CPU: The central processing unit (CPU) is the brain of your 3CX setup. For small deployments, a T2 micro instance with 1 vCPU and a baseline performance of 10% suffices. However, larger setups demand more powerful CPUs, with multi-core processors being the norm to handle increased loads. Intel and AMD CPUs are supported.  
  • Memory and Storage: RAM and storage space are pivotal for smooth operation. Depending upon your need, ensure your system can handle the load. Solid-state drives (SSD) are recommended for their speed and reliability, enhancing overall system performance. At least 30GB for 3CX installation, and remaining for recording, voicemail, logging, and backup. 
  • Network: A stable and fast internet connection is the backbone of your 3CX phone system. Adequate bandwidth to support voice traffic, low latency, and a reliable network setup are essential to ensure crystal-clear call quality. 3CX requires at least 1GB LAN connectivity for better performance. For more than 1000 extensions, 10GB LAN is required.  

General and X-86 based requirements 

3CX PBX Recommended Hardware Specifications 

Specification Small (Up to 10 Extensions) Medium (Up to 50 Extensions) Large (Up to 250 Extensions) Enterprise (Up to 1000 Extensions) Enterprise + (Up to 1000+ Extensions) 
CPU Intel i3 Gen 8 Intel i5 Gen 8 Intel i7 Gen 8 Intel Xeon E5 v4 Intel Xeon E7 v4 
Memory 2 GB RAM 6 GB  (Win), 4 GB (Linux) 10 GB  (Win), 8 GB (Linux) 18 GB  (Win), 16 GB (Linux) 34+ GB  (Win), 32+ GB (Linux) 
Storage 30 GB SSD 100 GB SSD 300 GB SSD 500 GB SSD 500+ GB SSD 
Operating System Linux / Windows Linux / Windows Linux / Windows Linux / Windows Linux / Windows 

3CX SBC (Session Border Controller) Recommended Hardware Specifications 

Specification Up to 50 (10 BLFs per device)  Up to 100 (10 BLFs per device) 
 Linux based Windows Based Linux based Windows Based 
CPU Intel I3 Gen 8 Intel i7 Gen 8 
Storage 30 GB  

Please note that the specifications in these tables are illustrative and based on general guidelines provided by 3CX for different sizes of deployments. Actual requirements may vary depending on your specific use case, additional features, and the number of users and devices connected to the system.  

Always consult with a 3CX professional service provider like RingOffice, or the latest 3CX documentation for the most accurate and up-to-date information. 

3CX Cloud Provider Specifications 

Cloud Provider Instance Type CPU Memory Storage Network Recommended for 
Google (GCP) e2-small to n1-standard Variable, based on instance Variable, based on instance Recommended 30 GB+ SSD High-performance options available Small to large deployments, depending on the instance 
Microsoft (Azure) B2s to D-series Variable, based on instance Variable, based on instance Recommended 30 GB+ SSD High-performance options available Small to large deployments, depending on the instance 
Amazon EC2 t2.micro to m5.large Variable, based on instance Variable, based on instance Recommended 30 GB+ SSD High-performance options available Small to large deployments, depending on instance 
Amazon Lightsail Small to Large Variable, based on instance  Variable, based on instance  20 GB to 640 GB SSD 1 to 5 TB transfer Small to medium deployment 

This table provides a general guide to the types of instances you might consider for a 3CX deployment in a cloud environment. The actual selection should be based on: 

  • Expected Load: The number of simultaneous calls and required features (like call recording, CRM integration, etc.) will influence CPU and memory needs. 
  • Growth Plans: Choose a cloud provider and instance that can scale with your business. 
  • Cost Considerations: Balance between performance needs and budget constraints. 
  • Network Requirements: Ensure the chosen cloud provider can meet your network performance needs, especially in terms of latency and bandwidth, to ensure high-quality voice calls. 

Installation and Configuration Tips 

Setting up 3CX with the right specifications is only the beginning. Proper installation and configuration are key to unlocking its full potential. Follow the best practices outlined in the 3CX documentation, and consider engaging a professional 3CX provider for a seamless setup. 

Advanced Considerations 

For businesses looking to leverage 3CX’s advanced features, additional hardware or software considerations may come into play. Video conferencing, CRM integration, and enhanced security features might require more robust hardware or specialized setups. 

Canadian businesses across various sectors have embraced 3CX, leveraging its flexibility and scalability to meet their unique communication needs. From tech startups in Vancouver to established financial institutions in Montreal, the stories of successful 3CX deployments are both inspiring and illustrative of the system’s versatility. 

You can check for these hardware updates on the 3CX website here.


1. Can I use 3CX on a standard desktop PC? 

While it’s technically possible for very small setups, it’s not recommended for business use due to reliability and scalability concerns. 

2. How often should I review my 3CX system requirements? 

Regularly reviewing your system specs, especially during growth phases or before integrating new features, ensures your setup remains optimal. 


The journey to a successful 3CX deployment is paved with careful consideration of system requirements and hardware specifications. For Canadian businesses looking to thrive in today’s digital landscape, understanding and adhering to these specifications is not just a recommendation—it’s a necessity. Whether you’re a small startup or a large enterprise, the right 3CX setup can transform your communication infrastructure, fostering connectivity, collaboration, and growth. 

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