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Use SIP trunks, WebRTC & Apps

Slash your Phone Bill by 80%


3CX is an open-standards IP Phone System which relies on VoIP technology. What’s VoIP? Voice Over Internet Protocol, which means audio data is transmitted over the internet eliminating the old PSTN lines and traditional telephony. With VoIP you can save truckloads on monthly telco bills and also have access to many features such as web conferencing, status, chat, fax over email, voicemail over email and much more.

Want to learn more about VoIP?

  • View our VoIP FAQ page
  • View our SIP FAQ page
  • View our WebRTC FAQ page

If you want to see how VoIP works first hand then try out 3CX for FREE. You can download 3CX on-premise on Windows or Linux or try it out in your own Google, Amazon or Azure account. It’s the best way to learn and it’s free!

Free for up to 1 year! Select preferred deployment:


for Linux on a $200 appliance or as a VM

Get the ISO


for Windows as a VM

Download the setup file

On the cloud

In your Google, Amazon, Azure account

Take the PBX Express