The Cobra 2DT system allows the extension of Sony's HD digital triax camera chains, such as the HXC-100K and HSC-300K, over durable, lightweight tactical fiber or over an installed fiber optic infrastructure. Cameras can now be separated from their CCUs and be located around a building, across a campus, or even 20 km (12.4 mi.) across town via metropolitan dark fiber. All of the signals carried on the camera chain's triax cable are extended on the fiber without any loss in signal or fidelity.