The 621R is an optical receiver for DVI signals up to 1920x1200 at 60Hz that converts an optical signal back to a DVI signal. It has a maximum data rate of 1.65Gbps and supports resolutions up to WUXGA. The 621R works with the 621T transmitter to transmit DVI signals over fiber optic or CAT5 cable up to 100m. It has DVI-D and LC fiber optic ports, supports HDCP, and can be rack mounted with other DigiTOOLS units.