Grandstream UCM6308 IP PBX
The Grandstream UCM6308 IP PBX is an enterprise-grade, on-premise unified communications system designed to handle large-scale deployments. It supports up to 3,000 users and 450 concurrent calls, integrating voice, video, messaging, conferencing, and collaboration into one secure and scalable platform. With 8 FXS and 8 FXO ports for analog/PSTN integration, three Gigabit PoE+ ports, and features like the Wave app and UCM RemoteConnect, it delivers powerful, flexible communications—without licensing fees.
Key Features
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Supports up to 3,000 users and 450 concurrent calls
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8 FXS and 8 FXO ports for analog/PSTN line integration
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Three Gigabit RJ45 ports with PoE+, and NAT/router or switch configuration
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Built-in Wave app for voice, video, chat, and coworking
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UCM RemoteConnect for secure, cloud-assisted remote extensions
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Audio conferencing for large groups (up to ~300 participants)
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Video conferencing with multiple HD rooms
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Color touchscreen display for system control
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Advanced security measures: secure boot, SRTP, TLS, HTTPS encryption
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Hot-standby failover for high availability
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Zero-touch provisioning for Grandstream endpoints
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REST API support for CRM, PMS, and custom integrations
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Cloud provisioning and monitoring via GDMS
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Built on Asterisk 16 for open-source reliability and flexibility




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