relay-switching system
1Electronic Switching System — In telecommunications, an electronic switching system (ESS) is: * A telephone exchange based on the principles of time division multiplexing of digitized analog signals. An electronic switching system digitizes analog signals from subscriber… …
2Semiautomatic switching system — In telecommunication, the term semiautomatic switching system has the following meanings: 1. In telephone systems, a switching system in which telephone operators receive call instructions orally from users and complete them by automatic… …
3Number 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… …
4Number 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,… …
5Relay — This article is about the electrical component. For other uses, see Relay (disambiguation). Automotive style miniature relay, dust cover is taken off A relay is an electrically operated switch. Many relays use an electromagnet to operate a… …
6Wire 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… …
7Director telephone system — The Director System was a system which made it possible to call subscribers at other telephone exchanges without operator intervention in large multi exchange cities, and to have a mixture of automatic and manual exchanges within these cities. It …
8IBM System/7 — The IBM System/7 was a computer system, designed in Boca Raton, and delivered in the 1971. [cite web last = IBM title = System/7 Chronology url=http://www 03.ibm.com/ibm/history/exhibits/system7/system7 chronology.html accessdate = 2007 11 22 ]… …
9Packet switching — is a digital networking communications method that groups all transmitted data – regardless of content, type, or structure – into suitably sized blocks, called packets. Packet switching features delivery of variable bit rate data streams… …
10Frame relay — In the context of computer networking, frame relay consists of an efficient data transmission technique used to send digital information. It is a message forwarding relay race like system in which data packets, called frames, are passed from one… …
