Main features & advantages of the Grandstream UCM6304A Audio Series IP PBX:

• Up to 1000 users, 150 concurrent calls, and 120 maximum concurrent SRTP calls
• Up to 5 audio meeting rooms, up to 120 participants
• Integrated platform for Instant Messaging (IM), Audio Conferencing, and Web Meetings to support access from desktops, mobile devices, IP phones, and other SIP terminals
• Comes with the free Grandstream Wave app for easy voice communication and Instant Messaging (IM) via desktops, network, and Android/iOS devices
• 320x240 LCD color touch screen for Shortcut keys and Scroll Bar
• Full-Band Opus voice codec and jitter resilience up to 50% against packet loss
• Advanced protection and security with secure boot, unique certificate, and random default password for call and account protection
• Includes API for collaboration with third-party platforms and applications as well as CRM and PMS platforms
• Customizable Auto Attendant and 5-level IVR (Interactive Voice Response) in multiple languages
• Enhanced reliability with Hot Standby High Availability support and local dual deployment
• Compatible with GDMS for cloud provisioning, remote management, and monitoring
• Based on Asterisk* open source telephony operating system version 16
• 6-core processor, 4 GB RAM + 128GB Flash memory
• 4 FXS ports & 4 FXO ports
• 3 Gigabit ports, PoE
• 2 USB 3.0 ports
• 1 SD Card interface
• Zero configuration provisioning of Grandstream SIP terminals
• Includes EU PSU 12V-1.5A power supply
• Wall/desktop mounting capability
• 2-year warranty