Grandstream UCM6304A IP-PBX with 4 FXO, 4 FXS, 1000 Users

Overview

The Grandstream UCM6304A is an IP-PBX system designed to unify voice, video, and data communication for growing organizations. Supporting up to 1000 users and 200 concurrent calls, it provides a scalable solution that accommodates expanding teams without the need for additional hardware or licenses. With four FXO ports for connecting public phone lines and four FXS ports for legacy analog devices like fax machines, it bridges traditional telephony with modern SIP endpoints seamlessly.

Powered by the stable Asterisk version 16 engine, this appliance delivers essential PBX features such as call routing, voicemail, and auto-attendant. Its zero-configuration provisioning simplifies deployment by automatically recognizing compatible Grandstream SIP phones, making it ideal for branch offices or seasonal expansions. The system also includes built-in collaboration tools like instant messaging, audio conferencing, and browser-based web meetings, eliminating the need for extra software subscriptions.

Key features

• Scalable platform supporting up to 1000 users and 200 simultaneous calls, accommodating business growth without hardware changes
• Four FXO ports enable connection to traditional public phone lines, while four FXS ports maintain compatibility with analog devices such as fax machines
• Zero-configuration provisioning allows quick setup of Grandstream SIP endpoints, reducing IT workload and deployment time
• Integrated voice, video, web conferencing, and instant messaging tools support remote and hybrid workforces without additional fees
• Robust security features including secure boot, unique device certificates, and TLS encryption protect communications from unauthorized access
• Open API facilitates integration with CRM and property management systems, streamlining workflows and call record management
• Rack-mountable design fits neatly into data closets or server racks, ensuring a clean and professional installation in corporate or multi-site environments

Key specs

• User capacity: up to 1000 users
• Concurrent calls: up to 200
• FXO ports: 4
• FXS ports: 4
• PBX engine: Asterisk version 16
• Provisioning: zero-configuration for Grandstream SIP endpoints
• Security: secure boot, unique device certificates, TLS encryption
• Form factor: rack-mountable appliance

Connectivity and compatibility

The UCM6304A supports a mix of analog and IP telephony, making it suitable for businesses transitioning from traditional phone systems to modern VoIP solutions. The FXO ports connect to public switched telephone networks, while the FXS ports allow legacy devices to remain operational alongside SIP phones. Its compatibility with Grandstream SIP endpoints ensures seamless integration and easy expansion.

• Four FXO ports for PSTN line integration
• Four FXS ports for analog device support
• Supports Grandstream SIP phones with automatic provisioning
• Open API for integration with CRM and property management software

Performance and reliability

Built on the proven Asterisk 16 platform, this IP-PBX delivers reliable telephony services with features like call routing, voicemail, and auto-attendant. The system’s security measures protect sensitive communications, making it suitable for industries with strict privacy requirements such as healthcare and legal services. Its ability to handle 200 concurrent calls ensures smooth operation even during peak usage.

Ideal uses and environments

This IP-PBX is well suited to medium and large businesses, including corporate headquarters, hotels, customer support centers, and multi-site retailers. It supports remote and hybrid work models through built-in collaboration tools, making it a strong choice for organizations that need a unified communication platform without recurring software fees. The rack-mountable design fits well in IT closets or data centers, maintaining a professional and organized infrastructure.