In electronics and telecommunications, a crossbar switch is a collection of switches arranged in a matrix configuration. A crossbar switch has multiple input and output lines that form a crossed pattern of interconnecting lines between which a connection may be established by closing a switch located at each intersection, the elements of the matrix. Originally, a crossbar switch consisted literally of crossing metal bars that provided the input and output paths. Later implementations achieved the same switching topology in solid-state electronics. The crossbar switch is one of the principal telephone exchange architectures, together with a rotary switch, memory switch, and a crossover switch.
A blue box is an electronic device that produces tones used to generate the in-band signaling tones formerly used within the North American long-distance telephone network to send line status and called number information over voice circuits. During that period, charges associated with long-distance calling were commonplace and could be significant, depending on the time, duration and destination of the call. A blue box device allowed for circumventing these charges by enabling an illicit user, referred to as a "phreaker," to place long-distance calls, without using the network's user facilities, that would be billed to another number or dismissed entirely by the telecom company's billing system as an incomplete call. A number of similar "color boxes" were also created to control other aspects of the phone network.
Two-way communication is a form of transmission in which both parties involved transmit information. Two-way communication has also been referred to as interpersonal communication. Common forms of two-way communication are:
Junk faxes are a form of telemarketing where unsolicited advertisements are sent via fax transmission. Junk faxes are the faxed equivalent of spam or junk mail. Proponents of this advertising medium often use the terms broadcast fax or fax advertising to avoid the negative connotation of the term junk fax. Junk faxes are generally considered to be a nuisance since they waste toner, ink and paper in fax machines.
A sender is a type of circuit and system module in 20th-century electromechanical telephone exchanges. It registered the telephone numbers dialed by the subscriber, and transmitted that information to another part of the exchange or another exchange for the purpose of completing a telephone call. Some American exchange designs, for example, of the No. 1 Crossbar switch used originating senders and terminating senders. The corresponding device in the British director telephone system was called a "director" and, in other contexts, "register".
Chris Collins may refer to:
Morales is a Spanish surname. Notable people with the surname include:
Daniel, Danny or Dan Wilson may refer to:
Linda Thompson is an American actress and songwriter.
Ramón José Sender Garcés was a Spanish novelist, essayist and journalist. Several of his works were translated into English by the distinguished zoologist, Sir Peter Chalmers Mitchell, including Seven Red Sundays , Mr Witt Among the Rebels and The War in Spain (Contraataque). He published articles in the Valencia-based Orto magazine between 1932 and 1934. During the Spanish Civil War Sender was among the contributors of El Mono Azul, a Republican literary magazine.
Ramón Sender Barayón is a composer, visual artist and writer. He was the co-founder with Morton Subotnick of the San Francisco Tape Music Center in 1962. He is the son of Spanish writer Ramón J. Sender.
Mark Hudson may refer to:
Cho is a Korean family name, historically Royal family name in Korea. As of 2000, there were 1,347,730 people by this surname in South Korea, about 1% of the total population. The name may represent either of the Hanja 趙 or 曺.
Hurley is an English and Irish surname. It is most often a habitational name derived from Old English hyrne 'corner' plus leah 'woodland clearing'. In Ireland it may be an Anglicized form of the Gaelic Ó hUrthuile 'descendant of Urthuile.
Panel Call Indicator, or PCI, is a form of signalling used between two telephone offices. It was also originally called Relay Call Indicator (RCI).
Ramón Sender may refer to:
Telex is a telecommunication service that provides text-based message exchange over the circuits of the public switched telephone network or by private lines. The technology operates on switched station-to-station basis with teleprinter devices at the receiving and sending locations. Telex was a major method of sending text messages electronically between businesses in the post–World War II period. Its usage went into decline as the fax machine grew in popularity in the 1980s.
Kid, Kids, KIDS, and K.I.D.S. may refer to:
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