8/8 FXO/FXS Port IP PBX

The Grandstream UCM6308 is a high-capacity IP PBX telephone system designed to bring business communications together on one centralised platform. Supporting up to 3,000 users and 450 concurrent calls, it combines voice, video calling, conferencing and advanced call management. With eight FXO and eight FXS ports, the UCM6308 is ideal for larger businesses requiring a flexible, scalable and reliable unified communications solution.

High-Capacity Business Telephone System

The UCM6308 supports up to 3,000 users, 450 concurrent G.711 calls and 300 concurrent encrypted SRTP calls. Its 8 FXO ports allow connection to analogue PSTN lines, while 8 FXS ports support analogue telephones and compatible devices. This makes it suitable for businesses upgrading existing telephone infrastructure to an IP-based system.

Unified Voice, Video and Conferencing

The UCM6308 combines IP telephony, video conferencing and web meetings within one system. It supports up to 25 simultaneous public meeting rooms and 300 participants across all rooms. Advanced features include call routing, voicemail, call recording, auto attendants, call queues and interactive voice response (IVR), helping businesses manage communications efficiently.

Remote Working and Mobile Communication

Compatible with the Grandstream Wave app, the UCM6308 allows employees to make and receive business calls using supported desktop, web and mobile devices. Integration with UCM RemoteConnect provides secure remote connectivity through a cloud NAT traversal service, supporting hybrid and remote working environments.

Flexible Networking and System Integration

The UCM6308 features three Gigabit Ethernet ports with integrated PoE+, two USB 3.0 ports and an SD card interface. Support for Grandstream ZeroConfig simplifies compatible IP phone provisioning, while GDMS enables cloud-based setup, monitoring and management. An API also supports integration with third-party business applications, including CRM and property management systems.

Advanced Security and Reliable Operation

Built-in security features include secure boot, unique device certificates, random default passwords and encrypted communications. Support for Hot Standby High Availability helps improve system resilience. The UCM6308 also offers rack-mount or desktop installation, making it suitable for professional communications environments.

Scalable IP PBX for Larger Businesses

Combining high call capacity, integrated analogue connectivity, conferencing and remote collaboration, the Grandstream UCM6308 IP PBX provides a comprehensive business telephone system for installers and organisations seeking centralised communications management.