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Grandstream UCM6304 IP PBX
Key Features
Brand: Grandstream
4 Video Conference rooms and up to 40 parties with 1080p
4x RJ11 Ports
128×32 dot matrix graphic LCD with DOWN and OK buttons
Zero configuration provisioning of Grandstream SIP endpoints
Built-in conferencing & meetings platform; supports desktop, Wave app, and SIP endpoints
Wave for Android, iOS, Chrome and Firefox browsers allows communication with all UCM6300 users & solutions
API available for third-party integrations, including CRM and PMS platforms
Advanced security protection with secure boot, unique certificate and random default password to protect calls and accounts
Three Gigabit auto-sensing RJ45 network ports with integrated PoE+ and support NAT router
Automated NAT firewall traversal service facilitates secure remote connections
Supports Full-Band Opus voice codec and H.264/H.263/ H.263+/H.265/VP8 video codec, jitter resilience up to 50% packet loss
Compatible with GDMS for cloud setup, management and monitoring
Based on Asterisk* version 16 open source telephony operating system
1 Year Warranty
Grandstream UCM6304 IP PBX Comprehensive Guide
Review the operational capabilities of the Grandstream UCM6304 IP PBX system for medium to large enterprises. Learn how this unified communications hardware optimizes high-volume voice traffic, multi-party video conferencing, and secure remote worker provisioning without ongoing licensing costs.
Introducing the Grandstream UCM6304 IP PBX
The Grandstream UCM6304 IP PBX is an on-premise business communication appliance tailored for expanding corporate offices, centralized call centers, and regional enterprise branches. This physical communication hub unifies enterprise voice telephony, video calling, instant messaging, and web meetings into a single network infrastructure. It eliminates ongoing monthly per-seat licensing fees, making it an attractive cost-saving alternative to entirely cloud-dependent setups.Â
Built upon a stable Asterisk version 16 open-source operating engine, the unit handles complex call-routing paths while acting as a bridge between legacy network wiring and modern internet protocol networks.
High Performance Multimedia Capabilities
Unlike the Audio Series variations, the standard UCM6304 model supports full multi-party video conferencing, video surveillance, intercom integrations, and digital data analytics out of the box. This means the appliance balances processing resources across both voice clarity and real-time desktop video layouts. It provides a complete unified communication solution for modern workspaces that need interactive visual meetings alongside standard telephone extensions.
Technical Specifications and System Capacities
Integrated Physical Connectivity
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- Foreign Exchange Station Ports: Outfitted with four integrated RJ11 FXS ports to plug in legacy desk phones, analog extensions, or fax machines directly.
- Foreign Exchange Office Ports: Equipped with four integrated RJ11 FXO ports to connect standard analog landlines directly from local public telecommunication companies.
- Lifeline Support: Engineered with physical hardware fallback bridges that maintain analog line connections during building electrical outages.
- Local Storage Interfaces: Includes two high-speed USB 3.0 ports and a dedicated SD card slot to record call histories, download voice message files, and store system logs.
- Front Display Screen: Features a physical 320×240 color liquid crystal display with a touchscreen on the front panel to provide shortcut system controls and quick hardware status scrolling.
Performance and Scalability Limits
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- Registered Extensions: Supports a maximum configuration of up to 2000 unique internal users or extensions on a single system appliance.
- Simultaneous Concurrent Conversations: Manages up to 300 simultaneous active calls across the platform at the exact same time.
- Secured Telephony Sessions: Supports up to 200 simultaneous concurrent calls under strict Secure Real-Time Transport Protocol data encryption
- Video Meeting Capacity: Controls built-in video conferencing rooms hosting a combined system total of up to 40 participants in full high-definition video.
Network Architecture and Security
Professional Processing and Routing
The physical appliance operates on an advanced 4-core processor paired with 4 gigabytes of random access memory and 128 gigabytes of internal flash storage memory. The external network infrastructure connects through three self-adaptive Gigabit network ports that operate smoothly in switched, routed, or dual-network modes. Integrated Power over Ethernet Plus technology allows the unit to extract electricity directly from local network switch ports, bypassing standard wall adapters.
Voice Quality and Resilient Traversal
To maintain clear call paths across unstable office connections, the hardware runs a Full-Band Opus voice codec. The internal logic includes automated line echo cancellation and a dynamic jitter buffer system. This technology enables understandable call operations even when network paths experience up to 50 percent packet loss.Â
Offsite employees maintain a connection to office phone extensions using the free Grandstream Wave application on their laptops or mobile devices. Remote mobile traffic routes through the automated Network Address Translation firewall traversal service to pass safely through security firewalls without open network ports.
