Grandstream UCM6304A IP PBX (Audio Only)

The Grandstream UCM6304A IP PBX (Audio Only) is a high-performance on-premise communications solution designed for businesses that require secure, reliable, and scalable audio communication. Supporting up to 1,000 users and 150 concurrent calls, it integrates voice, chat, conferencing, analog/PSTN support, and secure remote connectivity in a single powerful unit. With built-in tools like the Wave app and UCM RemoteConnect, it allows seamless collaboration whether you’re in the office or working remotely.

 Key Features

• Up to 1,000 users and 150 concurrent calls (120 with SRTP)

• 4 FXS and 4 FXO ports for analog and PSTN integration

• 3 Gigabit ports with PoE+ and dual-mode networking

• Integrated Wave app for mobile, desktop, and web voice/chat access

• Secure remote access via UCM RemoteConnect

• Full-band Opus codec with echo cancellation and jitter buffering

• Audio conferencing with up to 120 participants

• Hot-standby failover for high availability deployments

• Color LCD touchscreen for intuitive system control

• Built-in call queues, IVR, voicemail-to-email, and call recording

• REST API support for CRM/PMS integrations

• Compatible with GDMS for cloud provisioning and monitoring

• Powered by Asterisk 16 for reliability and flexibility