OEO definition by American Heritage Dictionary
oeo - Computer Definition
Optical repeaters are characterized as being OEO in nature. Such a repeater receives an attenuated optical signal, converts it to an amplified electrical signal, reshapes and retimes it, converts it back to optical signal, and retransmits it. See also OOO and repeater.
(Optical in/Electrical processing/Optical out) Refers to network devices that convert photonic transmission signals to electronic signals in order to analyze the traffic content for switching purposes. It then reconverts the signal to light for output. Contrast with OOO.