The Grandstream UCM6304A is an IP PBX appliance offering 4 FXO and 4 FXS ports, purpose-built to run a business's entire voice, video, and unified communications platform on a single box.
It supports up to 2,000 SIP users and 300 concurrent calls, making it suitable for growing organizations that need a full-featured, on-premise phone system. This 'A' series model focuses on audio-based UC without the video conferencing bridge of the standard series.
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| FXO Ports | 4 |
| FXS Ports | 4 |
| Max SIP Users | 2,000 |
| Max Concurrent Calls | 300 |
| Network Ports | Dual Gigabit LAN/WAN |
| Security | TLS, SRTP encryption for calls and accounts |
| Management | Grandstream Device Management System (GDMS) |
| All-in-One Platform: Replaces a separate PBX, conferencing bridge and voicemail system |
| Room to Grow: Scales from a small office up to hundreds of extensions |
| Centralized Management: GDMS makes remote provisioning and monitoring simple |
| Broad Compatibility: Works with Grandstream IP phones and most SIP-compliant endpoints |
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