1T-CT-445, 1T-CT-454, and 1T-CT-458 is a comprehensive system used for the transmission of RGBHV signals at resolutions up to 1920x1200 and 1080p over Cat.5/5E or Cat.6 cable at great distances. RS-232 control sequences are also transmitted on the same Cat.5/5e or Cat.6 cables which allow remote control of distant devices. The 1T-CT-445 Transmitter is capable of up to 300 meter (1,000') range. The 1T-CT-454 receiver supports distances of up to 150M (500') and the 1T-CT-458 receiver provides at 300M (1,000') range. Both receivers provide for Equalization and Gain adjustment and the 1T-CT-458 receiver also provides Skew correction capability. The system supports the DDC2B/EDID protocol which, when used with a DDC2B/EDID monitor, provides for automatic resolution detection for the remote monitor. The power connector on all units uses an exclusive locking device to prevent inadvertent loss of power and finally an optional rack mounting kit is available if desired.