Grandstream / UCM6300A / IPPBX 250 Users 50 Concurrent Call Gateway

The Grandstream UCM6300A is a high-performance, enterprise-grade IP PBX appliance designed to provide comprehensive audio communication and collaboration capabilities for businesses of all sizes. Part of the UCM6300 series, the UCM6300A focuses exclusively on voice services, delivering powerful telephony features without built-in video conferencing—making it a cost-effective and secure solution for businesses seeking a dedicated voice platform.

This appliance supports up to 500 users and 75 concurrent calls, making it ideal for small to medium-sized enterprises, branch offices, call centers, and remote teams. It allows seamless integration of IP phones, analog devices (via external FXO/FXS gateways), SIP trunks, and remote extensions. With built-in NAT firewall, SRTP/TLS encryption, and automated provisioning, the UCM6300A ensures secure communication and easy deployment across all environments.

The UCM6300A includes advanced features such as:

• Call routing, IVR (Interactive Voice Response), call queues
• Voicemail-to-email, call recording, and call detail records
• Ring groups, time conditions, and multi-language support
• Integration with Grandstream’s Wave app for remote communication via smartphones and desktops
• Compatibility with GDMS (Grandstream Device Management System) for cloud-based remote management and monitoring

Unlike many competing systems, the UCM6300A requires no recurring license or subscription fees, offering a one-time investment with ongoing savings. It’s also fully interoperable with third-party SIP devices and platforms, ensuring flexibility and future scalability.

Key Features:

• User Capacity: Up to 500 users
• Concurrent Calls: Up to 75
• Voice-only IP PBX (no video conferencing features)
• Secure Communications: TLS, SRTP, built-in firewall
• Interfaces: Dual Gigabit network ports with integrated PoE
• Storage: Supports external USB/SD storage for backups and call recordings
• Remote Access: Built-in NAT traversal, Grandstream Wave app support
• Management: Zero-config provisioning, GDMS compatibility

Whether you’re looking to modernize your voice infrastructure, improve call management, or support remote staff securely, the Grandstream UCM6300A delivers enterprise-level performance, reliability, and flexibility in a compact and cost-efficient package.