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Setting up a reliable business communication system starts with choosing the right infrastructure. 3CX, one of the most popular software-based PBX solutions, delivers powerful VoIP calling, video conferencing, live chat, call queues, and CRM integrations. However, its performance depends heavily on the hardware resources you allocate to the system.
Whether you’re deploying 3CX on-premise, in a data center, or on a cloud VM, understanding the correct 3CX hardware requirements is crucial. This guide explains the essential specs, performance considerations, deployment scenarios, and recommended configurations for teams of different sizes.
3CX can run efficiently on relatively lightweight hardware, making it suitable for small offices and scalable enough for large enterprises. Minimum requirements depend on:
Below is a baseline overview.
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3CX itself does not consume excessive memory, but certain features like call recording, real-time reporting, and video conferencing increase memory demand.
Recommended RAM
| Deployment Size | RAM Requirement |
|---|---|
| Small (Up to 25 users) | 2–4 GB |
| Medium (25–100 users) | 4–8 GB |
| Large (100–500+ users) | 8–16 GB |
| Enterprise (500+ users) | 16–32 GB |
If running additional services on the same server (CRM, databases, etc.), increase RAM accordingly.
3CX needs enough disk space for:
Suggested Storage
| Usage Type | Minimum | Recommended |
|---|---|---|
| OS + 3CX | 20 GB | 40+ GB SSD |
| Without Recordings | 40–60 GB | |
| With Call Recordings | 100–500 GB (SSD preferred) |
Tip:
Enable auto-purge for recordings to avoid storage overuse.
Since 3CX is a VoIP solution, network speed and stability directly impact call clarity.
3CX supports both Windows and Linux-based installations.
3CX is fully compatible with virtualization environments like:
3CX can be deployed on cloud platforms like:
Cloud VM Recommendation
| Users | vCPU | RAM | Storage |
|---|---|---|---|
| Up to 25 | 1 vCPU | 2–4 GB | 20–40 GB |
| 25–100 | 2–4 vCPU | 4–8 GB | 40–80 GB |
| 100–500 | 4–8 vCPU | 8–16 GB | 80–200 GB |
Most cloud providers offer one-click Debian installs, simplifying 3CX setup.
Recording doubles storage and increases CPU usage.
WebRTC requires more CPU and RAM.
For enterprise setups:
Meeting the correct 3CX hardware requirements is crucial for ensuring smooth performance, stable call quality, and scalability as your communication needs grow. Moon Technolabs brings extensive experience in VoIP development, PBX setup, SIP integrations, and enterprise telephony infrastructure, helping businesses deploy 3CX on the right hardware configuration—whether on-premise, virtualized, or cloud-hosted.
We assist with:
With Moon Technolabs, you get a tailored and reliable 3CX deployment that aligns perfectly with your business operations and performance expectations.
Not sure if your hardware can handle 3CX? Our experts assess, optimize, and deploy 3CX solutions tailored to your business needs.
Understanding 3CX hardware requirements ensures your PBX system operates efficiently without bottlenecks or quality issues. Factors such as expected concurrent calls, codec usage, recording requirements, and deployment mode all influence the ideal setup. By choosing the right hardware and optimizing your environment, you can unlock seamless communication and long-term system stability.
With Moon Technolabs as your VoIP implementation partner, you get expert guidance, optimized hardware planning, and end-to-end support—ensuring your 3CX system performs consistently and scales effortlessly with your business.
Jayanti Katariya is the CEO of Moon Technolabs, a fast-growing IT solutions provider, with 18+ years of experience in the industry. Passionate about developing creative apps from a young age, he pursued an engineering degree to further this interest. Under his leadership, Moon Technolabs has helped numerous brands establish their online presence and he has also launched an invoicing software that assists businesses to streamline their financial operations.
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