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RJ21X
A registered jack (RJ) is a standardized telecommunication network interface for connecting voice and data equipment to a computer service provided by a local exchange carrier or long distance carrier. Registered interfaces were first defined in the ''Universal Service Ordering Code'' (USOC) of the Bell System in the United States for complying with the registration program for customer-supplied telephone equipment mandated by the Federal Communications Commission (FCC) in the 1970s. Subsequently, in 1980 they were codified in title 47 of the Code of Federal Regulations Part 68. Registered jack connections began to see use after their invention in 1973 by Bell Labs. The specification includes physical construction, wiring, and signal semantics. Accordingly, registered jacks are primarily named by the letters ''RJ'', followed by two digits that express the type. Additional letter suffixes indicate minor variations. For example, RJ11, RJ14, and RJ25 are the most commonly used int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Micro Ribbon Connector
The micro ribbon or miniature ribbon connector is a common type of electrical connector for a variety of applications, such as in computer and telecommunications equipment having many contacts. The connector contains two parallel rows of lead (electronics), contacts within a electromagnetic shielding, shielded case having a characteristic D-shape similar to that used in D-subminiature connectors. The contacts are not pins, but small flat bands of metal, called ribbon contacts. The connectors are manufactured in many capacities, including 14-, 24-, 36-, 50-, 64-, and 100-pin varieties. They may be mounted on printed circuit board, boards, panels, or may terminate Telco cable, cables. Wires are attached by means of solder, crimp (joining), crimping or insulation-displacement connector, insulation displacement. Female connectors have bail handle, bail locks for a sturdy connection to the gender of connectors and fasteners, male connector. Screws may also be employed to secure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Administrative Council For Terminal Attachments
A registered jack (RJ) is a standardized telecommunication network interface device, network interface for connecting voice and data equipment to a computer service provided by a local exchange carrier or long distance carrier. Registered interfaces were first defined in the ''Universal Service Ordering Code'' (USOC) of the Bell System in the United States for complying with the registration program for customer-supplied telephone equipment mandated by the Federal Communications Commission (FCC) in the 1970s. Subsequently, in 1980 they were codified in title 47 of the Code of Federal Regulations Part 68. Registered jack connections began to see use after their invention in 1973 by Bell Labs. The specification includes physical construction, wiring, and signal semantics. Accordingly, registered jacks are primarily named by the letters ''RJ'', followed by two digits that express the type. Additional letter suffixes indicate minor variations. For example, RJ11, RJ14, and RJ25 are th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hush-A-Phone V
The Hush-A-Phone was a device designed to attach to the transmitter of a telephone to reduce noise pollution and increase privacy. Sold by the Hush-A-Phone company, the device was frequently described in its commercial advertisements as "a voice silencer designed for confidential conversation, clear transmission and office quiet. Not a permanent attachment. Slips right on and off the mouthpiece of any phone". Hush-A-Phone Corp. (originally Hush-A-Phone Sales Corp.) was a company founded in New York in 1921 or 1922 to market the Hush-a-Phone. The device was the topic of a landmark court case, '' Hush-A-Phone v. United States''. The Hush-A-Phone was regularly referred to in telecommunications policy analysis in the 1980s, attracting renewed interest in the 2000s as a symbol of a small company fighting against a monopoly, especially in the context of net neutrality. Indeed, because Hush-A-Phone eventually won its case against the phone company, the final legal proceedings involvin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tip And Ring
Tip and ring are the two conductors, or sides, of a telephone line. Their names are derived from the telephone plugs used for connecting telephone calls in manual switchboards. One side of the line is connected to the metal ''tip'' of the plug, and the second is connected to a metal ''ring'' behind the tip, separated and insulated from the tip by a non-conducting material. When inserted into a jack, the plug's tip conductor connects first, followed by the ring conductor. In many European countries, tip and ring are referred to as the ''A'' and ''B wires''. Neither of the conductors is permanently connected to earth, but one may be connected to earth during signaling operations. Typically, the ''ring'' conductor has a direct current (DC) potential of to with respect to the tip conductor when the line is in the ''on-hook'' (''idle'') state. ''Floating'' both conductors, i.e. not referencing either one to ground, minimizes the effect of interference from any nearby alternating curr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
8P8C
A modular connector is a type of electrical connector for cords and cables of electronic devices and appliances, such as in computer networking, telecommunication equipment, and audio headsets. Modular connectors were originally developed for use on specific Bell System telephone sets in the 1960s, and similar types found use for simple interconnection of customer-provided telephone subscriber premises equipment to the telephone network. The Federal Communications Commission (FCC) mandated in 1976 an interface registration system, in which they became known as registered jacks. The convenience of prior existence for designers and ease of use led to a proliferation of modular connectors for many other applications. Many applications that originally used bulkier, more expensive connectors have converted to modular connectors. Probably the best-known applications of modular connectors are for Telephone line, telephone and Ethernet. Accordingly, various electronic interface specif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Key Telephone System
A business telephone system is a telephone system typically used in business environments, encompassing the range of technology from the key telephone system (KTS) to the private branch exchange (PBX). A business telephone system differs from an installation of several telephones with multiple central office (CO) lines in that the CO lines used are directly controllable in key telephone systems from multiple telephone stations, and that such a system often provides additional features for call handling. Business telephone systems are often broadly classified into key telephone systems and private branch exchanges, but many combinations (hybrid telephone systems) exist. A key telephone system was originally distinguished from a private branch exchange in that it did not require an operator or attendant at a switchboard to establish connections between the central office trunks and stations, or between stations. Technologically, private branch exchanges share lineage with central ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
6P6C
A modular connector is a type of electrical connector for cords and cables of electronic devices and appliances, such as in computer networking, telecommunication equipment, and audio headsets. Modular connectors were originally developed for use on specific Bell System telephone sets in the 1960s, and similar types found use for simple interconnection of customer-provided telephone subscriber premises equipment to the telephone network. The Federal Communications Commission (FCC) mandated in 1976 an interface registration system, in which they became known as registered jacks. The convenience of prior existence for designers and ease of use led to a proliferation of modular connectors for many other applications. Many applications that originally used bulkier, more expensive connectors have converted to modular connectors. Probably the best-known applications of modular connectors are for Telephone line, telephone and Ethernet. Accordingly, various electronic interface specif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dial-up Internet
Dial-up Internet access is a form of Internet access that uses the facilities of the public switched telephone network (PSTN) to establish a connection to an Internet service provider (ISP) by dialing a telephone number on a conventional telephone line which could be connected using an RJ-11 connector. Dial-up connections use modems to decode audio signals into data to send to a Router (computing), router or computer, and to encode signals from the latter two devices to send to another modem at the ISP. Dial-up Internet reached its peak popularity during the dot-com bubble with the likes of ISPs such as Sprint Corporation, Sprint, EarthLink, MSN Dial-up, NetZero, Prodigy (online service), Prodigy, and America Online (more commonly known as AOL). This was in large part because broadband Internet did not become widely used until well into the 2000s. Since then, most dial-up access has been replaced by broadband. History In 1979, Tom Truscott and Jim Ellis (computing), Jim Ellis, g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
6P2C
A modular connector is a type of electrical connector for cords and cables of electronic devices and appliances, such as in computer networking, telecommunication equipment, and audio headsets. Modular connectors were originally developed for use on specific Bell System telephone sets in the 1960s, and similar types found use for simple interconnection of customer-provided telephone subscriber premises equipment to the telephone network. The Federal Communications Commission (FCC) mandated in 1976 an interface registration system, in which they became known as registered jacks. The convenience of prior existence for designers and ease of use led to a proliferation of modular connectors for many other applications. Many applications that originally used bulkier, more expensive connectors have converted to modular connectors. Probably the best-known applications of modular connectors are for telephone and Ethernet. Accordingly, various electronic interface specifications exist f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Modular Connector
A modular connector is a type of electrical connector for cords and cables of electronic devices and appliances, such as in computer networking, telecommunication equipment, and audio headsets. Modular connectors were originally developed for use on specific Bell System telephone sets in the 1960s, and similar types found use for simple interconnection of customer-provided telephone subscriber premises equipment to the telephone network. The Federal Communications Commission (FCC) mandated in 1976 an interface registration system, in which they became known as registered jacks. The convenience of prior existence for designers and ease of use led to a proliferation of modular connectors for many other applications. Many applications that originally used bulkier, more expensive connectors have converted to modular connectors. Probably the best-known applications of modular connectors are for telephone and Ethernet. Accordingly, various electronic interface specifications exis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
