Electronic and optical communications instruments and components, namely, digital transmitters; Electronic and optical communications instruments and components, namely, optical data links; Electronic and optical communications instruments and components, namely, optical receivers; Electronic and optical communications instruments and components, namely, optical transceivers; Electronic and optical communications instruments and components, namely, optical transmitters; Electronic communications systems comprised of computer hardware and software for the transmission of data between two points; Optical communications systems comprised of optical and electronic hardware and computer software for the transmission of data between two points; Transponders