Grandstream UCM6304 IP PBX
The Grandstream UCM6304 IP PBX is a powerful on-premise unified communications system designed for medium to large businesses. It supports up to 2,000 users and 300 concurrent calls, integrating voice, video, messaging, conferencing, and mobility into one secure and scalable platform. With 4 FXS and 4 FXO ports for analog/PSTN connectivity and built-in remote access tools like the Wave app and UCM RemoteConnect, it offers a complete communications solution — with no licensing fees.
Key Features
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Supports up to 2,000 users and 300 concurrent calls
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Includes 4 FXS and 4 FXO ports for analog and PSTN lines
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Three Gigabit ports with PoE+ and routing/switching capabilities
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Built-in Wave app for voice, chat, and collaboration
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UCM RemoteConnect for secure cloud-assisted remote access
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Audio and video conferencing support
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Color touchscreen interface for local management
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Advanced security: secure boot, SRTP, TLS, HTTPS
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Zero-touch provisioning for Grandstream devices
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GDMS compatibility for cloud-based configuration and monitoring
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Built on Asterisk 16 for reliability and flexibility




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