Grandstream UCM6304 IP PBX

Grandstream UCM6304 IP PBX System is a high-capacity unified communications platform designed for medium and large enterprises that require advanced voice, video, conferencing, and collaboration capabilities. Supporting up to 2,000 users and 300 concurrent calls, the UCM6304 delivers enterprise-grade telephony, video conferencing, remote collaboration, and business integration tools in a single centralized solution. With built-in FXO and FXS ports, cloud management support, advanced security features, and zero-touch provisioning, the UCM6304 helps organizations streamline communications while maintaining complete control over their communication infrastructure.

Product Features

Supports Up to 2,000 Users and 300 Concurrent Calls

The UCM6304 is designed for large organizations and multi-site deployments, supporting up to 2,000 registered users and 300 simultaneous calls. This makes it ideal for enterprises, educational institutions, healthcare facilities, hotels, and contact centers.

Integrated Voice, Video, and Collaboration Platform

The system combines voice calling, video conferencing, web meetings, messaging, analytics, facility access management, intercom functionality, and collaboration tools within a single platform, simplifying communication management across the organization.

Four FXO and Four FXS Ports

The UCM6304 includes four FXO ports for connecting PSTN telephone lines and four FXS ports for analog telephones and fax machines, allowing businesses to integrate traditional telephony services with modern IP communications.

Built-In HD Video Conferencing

The integrated conferencing platform supports multiple HD video conference rooms and up to 40 video participants, enabling effective communication between teams, branches, and remote workers without additional conferencing solutions.

Wave Application for Remote Collaboration

Wave for Android, iOS, Windows, macOS, Chrome, and Firefox allows employees to make calls, join meetings, send messages, and collaborate remotely from virtually anywhere.

Advanced Security Protection

Enterprise-grade security features include secure boot, unique device certificates, encrypted communications, SRTP, TLS, and randomized default credentials to safeguard business communications and user accounts.

Cloud Management and Remote Access

The UCM6304 integrates with GDMS cloud management for centralized deployment, monitoring, and maintenance. Automated NAT traversal services also facilitate secure remote connectivity for distributed teams.

Zero-Touch Provisioning

Grandstream SIP endpoints can be automatically discovered and provisioned, reducing deployment time and simplifying system administration.

Gigabit Networking with PoE+

Three Gigabit auto-sensing Ethernet ports with integrated PoE+ support provide reliable network performance and flexible deployment options while supporting router and switch modes.

Third-Party Integration Support

The built-in API enables integration with CRM platforms, property management systems (PMS), and other business applications, helping organizations automate workflows and improve operational efficiency.

High Availability and Reliability

The UCM6304 supports Hot Standby High Availability, helping ensure business continuity and minimizing downtime in mission-critical environments.

Asterisk-Based Telephony Platform

Built on Asterisk Version 16, the UCM6304 delivers enterprise-class telephony functionality, extensive customization options, and compatibility with a wide range of SIP devices and services.

Product Specifications

• Model: Grandstream UCM6304
• Product Type: Enterprise IP PBX System
• Maximum Users: 2,000
• Maximum Concurrent Calls: 300
• Maximum Concurrent SRTP Calls: 200
• FXO Ports: 4 × RJ11
• FXS Ports: 4 × RJ11
• Audio Conference Capacity: Up to 200 Participants
• Video Conference Rooms: Up to 4 Rooms
• Video Conference Participants: Up to 40 Participants
• Network Interfaces: 3 × Gigabit RJ45 Ports with PoE+
• USB Ports: 1 × USB 2.0, 1 × USB 3.0
• Storage Expansion: 1 × SD Card Slot
• Display: 320 × 240 Color Touchscreen LCD
• Audio Codecs: Opus, G.711 A-law/U-law, G.722, G.723.1, G.726-32, G.729A/B, iLBC, GSM
• Video Codecs: H.264, H.263, H.263+, H.265, VP8
• Fax Support: T.38
• Security Protocols: TLS, SRTP, HTTPS, SSH
• Cloud Management: GDMS Compatible
• Remote Connectivity: Automated NAT Traversal and Remote Access
• API Support: CRM and PMS Integration
• Operating System: Asterisk Version 16
• Provisioning: Zero-Touch Auto Provisioning
• High Availability: Hot Standby HA Support
• Installation Options: Rack Mount and Wall Mount
• Ideal For: Enterprises, Hotels, Educational Institutions, Healthcare Facilities, Government Organizations, and Multi-Branch Businesses

Benefits of Using UCM6304

• Affordable Cost: No additional costs or monthly subscriptions for user licenses or features.
• Remote Working: Through the Wave app , employees can use their mobile phones or computers to make and receive office calls from anywhere in the world.
• Strong Security Protection: Uses SRTP, TLS, and HTTPS encryption systems to protect the confidentiality of conversations and data.
• Cloud Management: Can be configured and managed remotely via the Grandstream Device Management System (GDMS) .
• Call Center Systems: Comes with modern features like IVR (Interactive Voice Response/Auto-Attendant) of up to 5 levels and call queues.

Office Size Recommendations for UCM6304

Maximum Capacity: It supports up to 2,000 users (extensions) and up to 300 simultaneous calls.

Perfect Fit: It is ideal for large enterprises, hotels, or multi-branch corporations with 500 to 1,500 active employees.

Alternative Options: If your office has fewer than 500 users, you might save money by looking at smaller models like the UCM6301 (up to 500 users) or UCM6302 (up to 1,000 users).