Grandstream UCM6304 IP PBX for 2,000 Users

The Grandstream UCM6304 serves larger communications estates that need to combine SIP with four analog lines and four analog devices. It supports 2,000 users and 300 concurrent G.711 calls or 200 concurrent SRTP calls, allowing the network manager to compare capacity with the extension population, call type, and peak traffic. Four FXS RJ11 ports and four FXO RJ11 ports provide direct analog paths. On the network side, three self-adaptive Gigabit ports incorporate PoE+ and a NAT router. Two included 12V power adapters support failover, distinguishing this appliance for a site that does not want its power plan to depend on one adapter.

Workload Planning with Grandstream UCM6304

The appliance distinguishes 300 concurrent G.711 calls from 200 concurrent SRTP calls, so planners should use the figure matching the intended call mode. Capacity for 2,000 users describes the account estate rather than simultaneous conversations. Together, these numbers help determine whether the unit fits a headquarters or a collection of communications-heavy departments. A 128×32 dot-matrix LCD gives technicians local information. One SD interface and two USB 3.0 ports provide additional physical connections that should remain accessible after installation.

Use in Saudi Business Facilities

The UCM6304 fits head offices, service centers, and multi-department facilities retaining analog lines or devices beside SIP phones. Rack placement organizes it with network equipment, while desktop placement supports teams needing direct access. Its four FXS ports connect four analog devices, and its four FXO ports accept four analog lines. Three Gigabit connections provide physical network options for the deployment design.

Choosing Against UCM6304A and UCM6308

The UCM6304 supports 2,000 users, 300 concurrent G.711 calls, and 200 concurrent SRTP calls. The named UCM6304A supports 1,000 users, 150 concurrent G.711 calls, and 120 concurrent SRTP calls, with the same count of FXS and FXO ports. The named UCM6308 steps up to 3,000 users, 450 concurrent G.711 calls, and 300 concurrent SRTP calls, with eight ports of each analog type. The UCM6304 therefore sits between the smaller audio-focused model and the higher-capacity eight-port appliance.

Power and Installation Layout

The package contains the UCM6304, Ethernet cable, two 12V power adapters, and quick installation guide. Prepare both power sources to use failover and plan four FXS routes, four FXO routes, and three Gigabit connections. Whether rack or desktop mounted, keep the display, USB ports, and SD interface reachable. Dress the cables so they do not load RJ11 connectors or obstruct service access.

Package Contents

• UCM6304
• Ethernet cable
• 12V power adapter × 2
• Quick Installation Guide