The high-performance matrix switcher chassis for DVI & HDMI signals. The unit is modular and populated from 4x4 to 32x32 in increments of four inputs and/or four outputs. The chassis includes one power supply but can also accept a second redundant power supply (sold separately), a control module and a test module that monitors and tests any input and output in the matrix. Fiber or Twisted Pair-all can be used at the same time, according to input/output module selection. The matrix receives digital signals from compatible Kramer transmitters, automatically converts between available infrastructure options and sends the signals to compatible Kramer receivers. Kramer’s unique technology for converting TMDS as well as control and communication to signals that run over twisted pair cables. Strongly recommend using Kramer DGKat™ cables designed specifically for optimum performance.