Specially designed for 3CX to offer a complete Unified Communications solution with advanced features right out of the box. Supporting around 256 concurrent calls with 800 users and built using the technology of the open-platform software PBX from 3CX. The Call4tel NX256 is making installation and management of your phone system easier than ever. The new Call4tel NX256 is the most powerful, performant and reliable appliance that 3CX currently supports, integrating smart features like the WebRTC based enhanced video conference, plug’n’play SIP trunk connectivity, state of the art anti-hacking module, and many more.