Grandstream UCM6304A IP PBX

Grandstream UCM6304A IP PBX is an enterprise-grade audio-only unified communications solution designed for organizations that require advanced voice communication, conferencing, collaboration, and remote connectivity. Supporting up to 1,000 users and 150 concurrent calls, the UCM6304A delivers a powerful platform for managing business telephony, instant messaging, audio meetings, and remote workforce communications. With four FXO ports, four FXS ports, integrated cloud management, and advanced security features, this IP PBX provides a scalable and cost-effective communication infrastructure for growing businesses, educational institutions, hotels, healthcare facilities, and multi-site organizations.

Product Features

Supports Up to 1,000 Users and 150 Concurrent Calls

The UCM6304A is designed to support medium and large organizations with up to 1,000 registered users and 150 simultaneous calls, providing the capacity required for demanding business environments.

Audio-Only Unified Communications Platform

This IP PBX integrates voice calling, instant messaging, audio conferencing, web meetings, mobility services, analytics, intercom functionality, and collaboration tools within a single communication platform.

Four FXO and Four FXS Ports

The system includes four FXO ports for connecting PSTN telephone lines and four FXS ports for analog telephones, fax machines, and other analog devices, making migration from traditional telephony systems simple and cost-effective.

Built-In Audio Conferencing and Web Meetings

The UCM6304A includes an integrated conferencing platform that enables businesses to host audio conferences and web meetings without the need for additional conferencing services or licenses.

Wave App for Remote Collaboration

The free Wave application allows users to make and receive calls, send instant messages, and participate in meetings from desktops, web browsers, Android devices, and iOS devices, supporting hybrid and remote work environments.

Zero-Touch Provisioning

Grandstream SIP endpoints can be automatically discovered and configured through Zero Config provisioning, significantly reducing deployment time and administrative effort.

Advanced Security Protection

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

Gigabit Networking with PoE+

Three Gigabit auto-sensing Ethernet ports with integrated PoE+ support provide reliable high-speed connectivity and flexible deployment options while supporting NAT router functionality.

Cloud Management and Remote Access

The UCM6304A supports GDMS cloud management and automated NAT firewall traversal services, enabling centralized deployment, monitoring, maintenance, and secure remote access.

High Availability and Business Continuity

Enhanced reliability is provided through support for Hot Standby High Availability and local dual deployment, helping ensure uninterrupted business communications.

Open API Integration

A comprehensive API allows seamless integration with CRM platforms, property management systems (PMS), and other third-party business applications, improving productivity and workflow automation.

Asterisk-Based Telephony Platform

Built on Asterisk Version 16, the UCM6304A offers enterprise-class telephony features, flexibility, and compatibility with a wide range of SIP devices and communication services.

Product Specifications

• Model: Grandstream UCM6304A
• Product Type: Audio-Only IP PBX
• Maximum Users: 1,000
• Maximum Concurrent Calls: 150
• Maximum Concurrent SRTP Calls: 150
• Voice Conference Capacity: Up to 150 Participants
• FXO Ports: 4 × RJ11
• FXS Ports: 4 × RJ11
• Network Interfaces: 3 × Gigabit Ethernet Ports with PoE+
• NAT Router Support: Yes
• 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
• Fax Support: T.38
• Security Protocols: TLS, SRTP, HTTPS, SSH
• API Support: Third-Party CRM and PMS Integration
• Cloud Management: GDMS Compatible
• Remote Connectivity: UCM RemoteConnect and Automated NAT Traversal
• Provisioning: Zero-Touch Auto Provisioning
• Telephony Platform: Asterisk Version 16
• High Availability: Hot Standby HA Support
• Installation Options: Desktop and Wall Mount
• Power over Ethernet: PoE+ Supported
• Ideal For: Medium Businesses, Enterprises, Hotels, Educational Institutions, Healthcare Facilities, and Multi-Site Organizations

Benefits and Communication System

• Wave App: Users can make free calls and send messages via computers or mobile phones (Android/iOS) using the Grandstream Wave App.
• Cloud Management: Fully compatible with GDMS ( Grandstream Device Management System) for free remote configuration and monitoring.
• Robust Security: It has advanced security including Secure Boot , Unique Certificates , and NAT firewall protection.
• Integration with Other Systems: Provides an open API for integration with customer management systems like CRM and PMS