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3CX Your SIP Proxy Server

A SIP Proxy, also known as a SIP Server or SIP Registar, handles the setup of SIP calls on the network. It is essential for a SIP PBX to work as a practical service as it handles functions such as helping route requests to the user’s location, authenticate and authorize users for services, implement provider call-routing policies and provide features to users.

An example of a SIP Proxy server is 3CX SIP server.

3CX a SIP Proxy Server

3CX is a SIP proxy server that replaces a proprietary PBX, supports popular SIP soft/hard phones, VoIP services and VoIP providers. The Unified Communications 3CX app for Android, iPhone, Windows and Mac makes phone system management easy.

Key Advantages:

  • Increases mobility
  • Open standard SIP proxy – use popular SIP phones and VoIP Gateways
  • Eliminates costly telephone tag
  • Easier installation, management, adds/moves
  • Deploy on Windows, Linux or in the Cloud
  • CRM, ERP, Outlook integration
  • Vendor independent

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