stored-program controlled exchange

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• Stored Program Control exchange — (SPC) is the technical name used for telephone exchanges controlled by a computer program stored in the memory of the system. Early exchanges such as Strowger, Panel, Rotary, and Crossbar were electro mechanical and had no software control. SPC… …   Wikipedia

• Telephone exchange — A telephone operator manually connecting calls with cord pairs at a telephone switchboard. In the field of telecommunications, a telephone exchange or telephone switch is a system of electronic components that connects telephone calls. A central… …   Wikipedia

• Controlled demolition hypothesis for the collapse of the World Trade Center — The controlled demolition hypothesis is a 9/11 conspiracy theory that claims the complete structural failure of the World Trade Center towers was not caused by the plane crash damage that occurred as part of the September 11, 2001 attacks, nor by …   Wikipedia

• World Trade Center controlled demolition conspiracy theories — Aerial view of the debris field of the North Tower, 6 WTC, and 7 WTC (upper right) The World Trade Center controlled demolition conspiracy theory is a conspiracy theory which contends that the collapse of the World Trade Center was not caused by… …   Wikipedia

• Stargate Program — The entrance to the Cheyenne Mountain complex in Colorado, home to Earth s Stargate Command in the Stargate universe. The Stargate Program is a fictional top secret program that plays a key role in the Stargate franchise: it surrounds the… …   Wikipedia

• SP-1 switch — SP 1 (Stored Program 1) was the name of a computerized telephone exchange (a so called switching office) manufactured by Northern Electric (later Northern Telecom and now Nortel Networks beginning in 1972) in Canada. It was introduced around 1967 …   Wikipedia

• Reed relay — A reed relay is one or more reed switches controlled by an electromagnet. The contacts are of magnetic material and the electromagnet acts directly on them without requiring an armature to move them. Sealed in a long, narrow glass tube, the… …   Wikipedia

• Palo Alto, California — Palo Alto redirects here. For other uses, see Palo Alto (disambiguation). City of Palo Alto   City   Palo Alto Skyline …   Wikipedia

• Automatic Message Accounting — (AMA) provides detail billing for telephone calls. When Direct Distance Dialing (DDD) was introduced in the USA, message registers no longer sufficed for dialed telephone calls. The need to record the time and phone number of each long distance… …   Wikipedia

• Feature group — Feature Groups in United States telephone jargon were switching arrangements between Local exchange carriers central offices to interexchange carriers.Such an arrangement allowed the LEC s end users to make (long distance) phone calls using the… …   Wikipedia

• Nobel Prizes — ▪ 2009 Introduction Prize for Peace       The 2008 Nobel Prize for Peace was awarded to Martti Ahtisaari, former president (1994–2000) of Finland, for his work over more than 30 years in settling international disputes, many involving ethnic,… …   Universalium