clear-forward signal

См. также в других словарях:

• clear-forward/clear-back signal —    Signal sent in a forward or backward direction to announce that the called party has cleared …   IT glossary of terms, acronyms and abbreviations

• Traffic signal preemption — is a type of system that allows the normal operation of traffic lights to be preempted, often to assist emergency vehicles.[1][2] The most common use of these systems is to manipulate traffic signals in the path of an emergency vehicle, stopping… …   Wikipedia

• disconnect signal —    The on hook signal by which the calling and called stations notify the switching equipment that an established connection is no longer needed and should be released. See also clear forward/clear back signal …   IT glossary of terms, acronyms and abbreviations

• Railway semaphore signal — One of the earliest forms of fixed railway signal is the semaphore. These signals display their different indications to train drivers by changing the angle of inclination of a pivoted arm . Semaphore signals were patented in the early 1840s by… …   Wikipedia

• Automatic Block Signal — Basic Automatic Block Signals = Automatic Block Signal, or ABS, systems consist of a series of signals that govern blocks of track between the signals. The signals are automatically activated by the conditions of the block beyond the signal.… …   Wikipedia

• Abbots Ripton rail accident — The Abbots Ripton rail disaster occurred on 21 January1876, when the Flying Scotsman express train from Edinburgh to London was involved in a double collision during a blizzard, [Report of the Court of Enquiry into the Circumstances Attending the …   Wikipedia

• British absolute block signalling — The principle of the British absolute block system of railway signalling is to facilitate the safe operation of a railway by preventing more than one train from occupying a defined section of route at the same time. This system is used on double… …   Wikipedia

• Automated guided vehicle — The automated guided vehicle or automatic guided vehicle (AGV) is a mobile robot used in industrial applications to move materials around a manufacturing facility or a warehouse. Introduction Automated guided vehicles (AGVs) help to reduce costs… …   Wikipedia

• Bombing of Braunschweig in World War II — The Bombing of Braunschweig (or Brunswick) in World War II on the night of 14/15 of October 1944 by No. 5 Group Royal Air Force (RAF) marked the high point of the destruction of Henry the Lion s city in the Second World War. The air raid, part of …   Wikipedia

• Chicago Blackhawks — Blackhawks redirects here. For other uses, see Black Hawk (disambiguation). Chicago Blackhawks 2011 12 Chicago Blackhawks season …   Wikipedia

• Mercedes-Benz S-Class — Manufacturer Mercedes Benz Production 1954–present Assembly Berlin Frankfurt, Ge …   Wikipedia