About Grandstream UCM6304 4 FXO 4 FXS 2500 Users

The Grandstream UCM6304 is an enterprise-grade IP PBX appliance that brings voice, video, conferencing, and collaboration together on one centralised platform — with no licensing fees, ever. Supporting up to 1,000 users and 150 concurrent calls, it's a great pick for growing businesses that need a capable, future-ready phone system without the ongoing cost of per-seat licences. With 4 FXO ports for PSTN lines and 4 FXS ports for analog devices, it bridges your existing infrastructure with modern VoIP — all in a rack or desktop-mountable unit.

Key Features

• No Licensing Fees — Every feature is included out of the box, with no monthly costs or per-seat charges — what you pay for is what you keep.
• 4 FXO & 4 FXS Ports — Connect up to 4 PSTN lines and 4 analog devices like fax machines or legacy handsets, keeping your existing infrastructure in play.
• Built-In Video & Web Conferencing — Host audio conferences with up to 120 participants and video conferences with up to 30 — straight from the PBX, no third-party platform needed.
• Wave App Integration — Staff can make and receive calls, join meetings, and collaborate via the Grandstream Wave app on Android, iOS, Chrome, or Firefox — from anywhere.
• Three Gigabit Ports with PoE+ — Supports switched, routed, or dual-card network modes, and can power compatible Grandstream phones directly from the PBX.
• Enterprise Security — Secure boot, SRTP encryption, automated NAT firewall traversal, and a unique default certificate keep your communications locked down.
• Zero-Config Provisioning — Grandstream SIP endpoints auto-discover and provision with minimal setup, cutting deployment time significantly.

Why Choose This Product?

The UCM6304 is a solid foundation for any business that wants full control over its communications without paying ongoing licence fees. It's straightforward to manage, scales well, and integrates with third-party CRM and PMS platforms via API. Our Telrexperts can help you design the right setup for your environment and get your system up and running quickly.

What's in the Box

• Grandstream UCM6304 IP PBX
• Power Adapter
• Ethernet Cable
• Mounting Ears & Screws
• Quick Installation Guide