overhead network
41Citylink Wellington — CityLink is a telecommunications company based in Wellington, New Zealand. The company operates a network of fibre optic cabling around the CBDs of Wellington and Auckland. The company also has a network of Wi fi hotspots around Wellington. The… …
42Claire Trevor School of the Arts — Claire Trevor Theater and related structure General information Architectural style Brutalist Town or …
43South London Route Utilisation Strategy — Network Rail s (NR) South London Route Utilisation Strategy (SLRUS), published in March 2008[1][2][3] (SLRUS) was the eighth Route Utilisation Strategy to be produced. By default, RUSs are established by the Office of Rail Regulation (ORR) unless …
44Railway electrification in Great Britain — describes the past and present electrification systems used to supply traction current to railways and tramways in Great Britain with a chronological record of development, a list of lines using each system, and a history and a technical… …
45Synchronous optical networking — (SONET) and Synchronous Digital Hierarchy (SDH), are two closely related multiplexing protocols for transferring multiple digital bit streams using lasers or light emitting diodes (LEDs) over the same optical fiber. The method was developed to… …
46Third rail — For other uses, see Third rail (disambiguation). Third rail at the West Falls Church Metro station near Washington, D.C., electrified at 750 volts. The third rail is at the top of the image, with a white canopy above it. The two lower rails… …
47Electric power transmission — Electric transmission redirects here. For vehicle transmissions, see diesel electric transmission. 400 kV high tension transmission lines near Madrid Electric power transmission or high voltage electric transmission is the bulk transfer of… …
48List of current systems for electric rail traction — This a list of the power supply systems that are, or have been, used for tramway and railway electrification systems. Note that the voltages are nominal and vary depending on load and distance from the substation. Many modern trams and trains use …
49Trolleybus — A trolleybus (also known as trolley bus, trolley coach, trackless trolley, trackless tram or simply trolley) is an electric bus powered by two overhead wires, from which it draws electricity using two trolley poles. Two poles are required in… …
50Optical Carrier — levels describe a range of digital signals that can be carried on SONET fiber optic network.cite web | title = Synchronous Optical Network (SONET) | work = Web ProForums | publisher = International Engineering Consortium | url =… …
