The Grandstream UCM6304 4-Port IP PBX delivers a comprehensive communication solution that integrates voice, instant messaging, audio conferencing, and web meetings into a single platform. Designed for businesses with up to 1500 users, it ensures seamless communication with advanced security, remote access, and third-party integrations.

• Supports up to 1500 users and 200 concurrent calls

• Built-in Instant Messaging, Audio Conferencing, and Web Meetings platform

• Free Wave App for voice and instant messaging on desktops, web, and mobile devices

• Three Gigabit auto-sensing RJ45 ports with integrated PoE+ and NAT router support

• Automated NAT firewall traversal service for secure remote connections