This paper discusses optical datalinks, the electro-optic devices that are the interfaces between electrical circuits and fiber optic cables. To meet the market-driven requirements of cost, performance, and early availability, datalinks must be designed and manufactured using Design for X (DFX) techniques, and well-controlled processes and easily incorporated improvements from research. These datalinks are used in both multimode and single mode systems, depending on the demands of physical distance and desired data rates. This paper will present an overview of the currently available products and technologies, including optical switches that can be used in local area networks.