Designed as an HDBaseT extender and control system, Arista's 1RU rackmount RS-121-A07-TX (transmitter). Featuring modular design, the RS-121 was developed to minimize installation time and effort while providing a significant maintenance advantage by way of its ability to swap the transmitter, receiver, or computer modules rapidly. The RS-121-A07-TX transmitter is equipped with the company's ARD-1006-A07-TX HDBaseT transmitter module, featuring an HDMI Loopback output, a 2-port 10/100Mbps Ethernet pass through hub, an RS-232 port, IR control, plus Power over HDBaseT.