two-wire+switching

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• Two-wire circuit — A two wire circuit is characterized by supporting transmission in two directions simultaneously, as opposed to four wire circuits, which have separate pairs for transmit and receive. In either case they are twisted pairs. Telephone lines are… …   Wikipedia

• Wire spring relay — A wire spring relay is a type of relay, primarily manufactured by the Western Electric Company for use by the Bell System in electromechanical telephone exchanges. It was licenced for use around the world, and was commonplace in Japan. A wire… …   Wikipedia

• Multiway switching — In building wiring, multiway switching is interconnection of two or more light switches to control lighting from more than one location. This allows lighting in a hallway or stairwell to be controlled from either end. Contents 1 Three way and… …   Wikipedia

• Single-wire earth return — (SWER) or single wire ground return is a single wire transmission line for supplying single phase electrical power from an electrical grid to remote areas at low cost. It is principally used for rural electrification, but also finds use for… …   Wikipedia

• Number Five Crossbar Switching System — The Number Five Crossbar Switching System or 5XB switch, designed by Bell Labs and made by Western Electric, was in use in Bell System telephone exchanges from 1948 to the 1980s. Its principal use was as a Class 5 telephone switch, though… …   Wikipedia

• Double switching — A single switched relay can close inadvertently in response to a single false feed current. A double switched relay cannot close inadvertently with the application of the same current. At least two separate faults would be required to allow this… …   Wikipedia

• Multiprotocol Label Switching — MPLS redirects here. For other uses, see Mpls. MPLS Layer Multiprotocol Label Switching (MPLS) is a mechanism in high performance telecommunications networks that directs data from one network node to the next based on short path labels rather… …   Wikipedia

• Safety wire — Safety wiring of two pairs of drilled head bolts Safety wire or lockwire is common in the aircraft and racing industries as an extra precaution to keep vital fasteners from unintentionally loosening and parts from falling off due to vibration or… …   Wikipedia

• Circuit switching — is a methodology of implementing a telecommunications network in which two network nodes establish a dedicated communications channel (circuit) through the network before the nodes may communicate. The circuit guarantees the full bandwidth of the …   Wikipedia

• Number One Crossbar Switching System — The Number One Crossbar Switching System, or 1XB switch, was the primary urban local telephone exchange design used by the Bell System in the mid 20th century. Its switch fabric topology was based on the earlier urban panel switch system, which,… …   Wikipedia

• Wormhole switching — Wormhole flow control, also called Wormhole switching or Wormhole routing is a system of simple flow control in computer networking based on known fixed links. It is a subset of flow control methods called Flit Buffer Flow Control. [] . Routing… …   Wikipedia