4K HDBaseT™ 4x4 Matrix SwitcherMX-HDBASE4X4-4KKanexPro.com4.3.7 Bi-directional RS232 Control .................................................................. 244.4 TCP/IP Control ................................................................................................. 254.4.1 Control Modes ........................................................................................ 254.4.2 GUI for TCP/IP control ........................................................................... 274.4.3 GUI Update ............................................................................................ 304.5 Firmware Update via USB ................................................................................ 305. Specification .............................................................................................................. 326. Panel Drawing ........................................................................................................... 337. Troubleshooting & Maintenance ................................................................................ 348. After-sales Service .................................................................................................... 36