- Enterprise-Grade Unified Communication Solution - IP PBXs allows businesses of all sizes to build powerful and scalable unified communication solutions in an easy-to-manage fashion with no licensing fees - Analog Telephone FXS Ports: 8 RJ11 Port - PSTN Line FXO Ports: 8 RJ11 Port - Users: 3000 - Concurrent calls: 450 - Max concurrent SRTP calls: 300 - Video Conference: Up to 40 - 8 Video Conference rooms and up to 60 parties with 1080p, assuming 4 video feeds + 1 screen sharing (H.264 & Opus) Voice Conference: Up to 200 parties (G.711) - Three self-adaptive Gigabit ports (switched, routed or dual card mode) with PoE+ - 2 USB 3.0, 1SD card interface - 128x32 dot matrix graphic LCD with DOWN and OK buttons Maximum Concurrent Calls: 400 Number FXO Ports: 8 Number FXS Ports: 8 Wall or Rack Mountable: Wall Color: Black