Grandstream UCM6308 IP PBX Supports 3000 Users & 450 Concurrent Calls, Built-in Video Conferencing, Wave App, Advanced Security, 3x Gigabit PoE+ Ports, Cloud & API Integration

Elevate your organization’s communication infrastructure with the Grandstream UCM6308 IP PBX, a premium, scalable solution designed to unify and streamline business communications across voice, video, web meetings, surveillance, data, and more. Grandstream UCM6308 is capable of supporting up to 3000 users and 450 concurrent calls, the UCM6308 is ideal for medium to large businesses, call centers, and multi-site enterprises.

The Grandstream UCM6308 offers zero-configuration provisioning for Grandstream SIP endpoints, making setup fast and hassle-free. It includes a built-in video conferencing and web meeting platform compatible with Grandstream SIP video devices, desktops, and the Wave app for Android, iOS, Chrome, and Firefox. This ensures seamless communication between in-office teams and remote staff, supporting modern hybrid work environments.

For enhanced accessibility and security, the Grandstream UCM6308 integrates with UCM RemoteConnect, a cloud-based NAT traversal service for secure, remote connections without complex VPN setups. Coupled with advanced security protections like secure boot, device-specific certificates, and randomized default passwords, it effectively safeguards against unauthorized access and SIP-based attacks.

Equipped with three Gigabit auto-sensing RJ45 ports with PoE+ and built-in NAT routing, the UCM6308 streamlines your network infrastructure while supporting high-speed connectivity for all endpoints. Audio and video quality are optimized with support for Full-Band Opus voice codec and multiple video codecs including H.264, H.265, VP8, and H.263+, providing jitter resilience of up to 50% packet loss — perfect for high-reliability voice and video communications.

The UCM6308’s open API support allows easy integration with popular third-party CRM, PMS, and business software, while cloud management via Grandstream Device Management System (GDMS) offers centralized configuration, monitoring, and troubleshooting.

Grandstream UCM6308 is built on Asterisk 16 open-source telephony engine, the UCM6308 delivers enterprise-level performance with a future-proof foundation, ensuring compatibility, flexibility, and community-driven innovation. Whether managing video surveillance, facility access systems, intercoms, or web conferencing, the UCM6308 consolidates these services into one powerful, secure, and intuitive platform.

Key Features:

• Supports 3000 users and 450 concurrent calls

• Built-in video conferencing and web meeting platform

• Zero-configuration for Grandstream SIP endpoints

• Wave app for Android, iOS, Chrome, and Firefox

• UCM RemoteConnect for secure remote access

• 3x Gigabit RJ45 with PoE+ and NAT router

• Supports Full-Band Opus and advanced video codecs (H.264/H.265/VP8)

• GDMS cloud-based setup and management

• Open API integration for CRM/PMS platforms

• Enterprise-grade security protections

• Powered by Asterisk version 16

Perfect for growing businesses and enterprises seeking a flexible, powerful, and unified communications platform, the Grandstream UCM6308 ensures maximum productivity, seamless connectivity, and enterprise-level reliability — both on-site and remotely.