4/4 FXO/FXS Port IP PBX

The Grandstream UCM6304 is a powerful IP PBX telephone system designed to centralise business communications on one secure platform. Supporting up to 2,000 users and 300 concurrent calls, it combines voice, video calling, conferencing and advanced call management. With four FXO and four FXS ports, the UCM6304 provides a flexible unified communications solution for medium to large businesses looking to modernise their telephone systems.

High-Capacity Business Telephone System

The UCM6304 supports up to 2,000 users, 300 concurrent G.711 calls and 200 concurrent encrypted SRTP calls. Its four FXO ports connect to analogue PSTN telephone lines, while four FXS ports support analogue telephones and compatible devices. This allows businesses to retain existing analogue equipment while upgrading to IP-based communications.

Integrated Voice, Video and Conferencing

The UCM6304 combines IP telephony, video conferencing and web meetings within one centralised system. It supports up to 15 simultaneous public meeting rooms and 200 participants across all rooms. Advanced functions include call recording, voicemail, call queues, automatic call distribution, call routing and interactive voice response (IVR). These features help businesses manage incoming calls and improve customer communication.

Remote Working and Mobile Connectivity

The UCM6304 works with the Grandstream Wave app, allowing employees to make and receive business calls using compatible desktop, web and mobile devices. Support for UCM RemoteConnect enables secure remote connectivity through a cloud-based NAT traversal service, making it easier to support hybrid and remote working teams.

Flexible Network Integration and Management

Featuring three Gigabit Ethernet ports with integrated PoE+, the UCM6304 supports flexible network configurations. It also includes two USB 3.0 ports and an SD card interface. Grandstream ZeroConfig simplifies compatible IP phone provisioning, while GDMS provides cloud-based device setup, monitoring and management. An API supports integration with third-party applications, including CRM and property management systems.

Advanced Security and Reliable Installation

Built-in security includes secure boot, unique device certificates, random default passwords and encrypted communications. Hot Standby High Availability support helps improve system resilience. The UCM6304 also supports rack-mount or desktop installation, providing flexibility for professional communications environments.

Scalable Unified Communications for Business

Combining extensive call management, analogue connectivity, conferencing and remote collaboration, the Grandstream UCM6304 IP PBX is a practical choice for businesses seeking a secure, scalable and centrally managed telephone system.