The BXB EDC-2051 Conference Main Control Unit offers quick installation & easy maintenance via CAT5E cables. It is equipped with 4-chain RJ45 ports. Each port enables a maximum of 15 units; the total is 50 units. With BXB extension power supply, it enables a maximum of 265-unit connection. The BXB EDC-2051 has a 4×20 digits LCD screen: showing conferencing modes, the ID of the operating microphones, microphone volume and other configurations. It features multiple operating modes such as Normal/ Chairman/ Override. The BXB EDC-2051 Main Control Unit is equipped with an RS-232 interface that connects with BXB HDS-720 IP Network AV Controller, camera, and other environmental control equipment for system integration. The equipped XLR plug enables the connection with other recording and audio equipment. Microphone auto-scanning ensures the status of each microphone before the meeting. It also has a microphone auto-off setting (30/45 seconds). Open-mic mode or activates the max. of 9 microphones at the same time. The BXB EDC-2051 comes with a 1-year warranty.