What Is a Wireless Email Device?

English abbreviation ICD, full name is Industrial Communication Device. This column will comprehensively introduce the wired communication equipment and wireless communication equipment applicable to the industrial control environment. Wired communication equipment mainly introduces serial equipment communication, professional bus communication, industrial Ethernet communication, and conversion equipment between various communication protocols. Wireless communication equipment is mainly wireless AP, wireless bridge, wireless network card, wireless arrester, antenna and other equipment.

Communication equipment

English abbreviation ICD, full name is Industrial Communication Device. This column will comprehensively introduce the wired communication equipment and wireless communication equipment applicable to the industrial control environment. Wired communication equipment mainly introduces serial equipment communication, professional bus communication, industrial Ethernet communication, and conversion equipment between various communication protocols. Wireless communication equipment is mainly

Wi-Fi (Wireless Fidelity), meaning wireless fidelity, is a short-range wireless technology used in offices and homes. This technology uses

The theory of electromagnetic waves is

3G communication equipment refers to the third generation digital communication equipment. The first generation of communication equipment introduced in 1993 can only make voice calls; the second generation of communication equipment that appeared from 1996 to 1997 can receive data, such as viewing emails and web pages; the main difference between 3G communication equipment and the previous two generations is The increase in the speed of transmitting sound and data, it can handle a variety of media forms such as images, music, video streams, and provides a variety of information services including web browsing, conference calls, e-commerce, and more.

Three Chinese operators, China Unicom, China Mobile and China Telecom, attach great importance to the construction of communication networks. At present, China Telecom has the most complete infrastructure. In order to allow more users to experience the era of network applications in the 3G era, China Unicom and China Mobile have accelerated the investment and development of communications equipment and construction.

Communication history

The era of spoken times, the era of ancient drum writing, Western Zhou Dynasty, the post writing era, 100 BC Hongyan Biography is also known as the flying pigeon biography, the writing era, 7th century BC, the lighthouse writing era, 1777 The slogan printing era 1792 The Frenchman Sharpe brothers invented the optical signal transmitter printing era 1837 The American Morse test-cabled the cable telegraph in Washington and Baltimore. The printing era was successful. , Bell invented the first phone in history. American Bell invented the phone in the printing era 1876; American Edison invented the phonograph in the printing era 1877; German Hertz used the experiment to verify electromagnetic waves in 1887; in the printing era the Italian Marconi successfully tested radio between Britain and France in 1889 ; In the era of printing in 1895, Russian Popov and Italian Marconi successfully developed a radio receiver at the same time. In the era of printing, the Lumière brothers of France premiered their first film in Paris in 1895. The transatlantic cable was successfully laid in the printing era in 1901; in the printing era in 1912, the radio saved more than 700 lives during the Titanic shipwreck. In the printing era, the long-distance radio communication between Paris and Washington was successful in 1915; in the 1920s, the radio came out in the printing era, and in the 1920s, the British Baird successfully transmitted television pictures and was known as the inventor of television. In the printing era in 1926, the British Beate completed television image development at the Royal Institute; in the printing era in 1946, the first electronic computer "ENIAC" was introduced at the Moore School of Electrical Engineering at the University of Pennsylvania; in the printing era, American Shockley in 1947 Invented the transistor; in the printing era, IBM developed the "IBM 650" series of computers in 1953; in the printing era in 1955, the United States issued the first military electronic computer for the needs of the war. Printing era In 1956, the American company Apex invented a video recorder. In the printing era, IBM developed the first high-level language "Fortran" in 1957. The printing era was an exciting year in 1958. This year American Davos discovered the principle of lasers. In the printing era, the United States made the first-generation minicomputer, PDP I, in 1960; in the printing era, in 1962, the United States launched the first artificial satellite and opened the era of television satellite transmission. In the era of printing in 1962, US communications satellites and European communications were successful; in the age of network transmission, in 1969, the US Army established the ARPANET to prevent communication interruption in the event of an attack. In the era of network communication, the United States proposed a blueprint for global communication networks in 1969; in the era of network communication, Intel made ultra-compact integrated chips in 1970; in the age of network communication, American Bill Gates developed the "Basic" language; in the era of network communication, Apple in 1977 The company made a PC "Apple II"; in the era of network communication, the United States proposed a plan for the construction of a high-speed communication network in 1978; in the era of network communication, the legendary American Xero company research team under the leadership of Bob Taylor developed the Internet predecessor of network communication Time In 1981, Microsoft Corporation of the United States developed "MS-DOS". In the same year, IBM released IBM-PC; in the era of network communication, in 1983, the US Department of Defense divided the ARPANET into military and civilian networks, and gradually expanded it to today's Internet. CD-ROM appeared in the era of network communication in 1984, and communication entered a mass era. Apple launches shopping computer; in the age of network communication, virtus increased sharply with the development of communications in 1988; in the age of network communication, Motorola, the United States, and IBM and Apple cooperated to launch the Power-PC chip in the age of network communication. In 1993, the United States announced the establishment of information Highway access plan to integrate computer, telephone, and television media. In the era of network communication, Intel Corporation of the United States developed a non-Risc high-performance CPU in 1993; in the era of network communication, the information highway was established in Florida in 1994; in the era of network communication, Microsoft developed "Windows95" in 1995 to integrate network functions on PCs.