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Gender Changer
A gender changer is a hardware device placed between two cable connectors of the same type and gender. An example is a cable connector shell with either two female or two male connectors on it (male-to-male or female-to-female), used to correct the mismatches that result when interconnecting two devices or cables with the same gender of connector. Gender changers are used for RS-232C ports in either the original DB-25 or the IBM AT DE-9 format. They are also used when extending any sort of cable that normally has plugs on both ends (rather than a socket on one and plug on the other), however in this case it is usually called just an "extender", such as with F connectors, BNC connectors, and various RJ connectors used in telephony and computer networking. Gender changers are used in professional audio to adapt XLR connectors, RCA connectors, Speakon connectors and TRS phone connectors. The null modem is a computer communications adapter which may appear to be a gender cha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Telephony
Telephony ( ) is the field of technology involving the development, application, and deployment of telecommunications services for the purpose of electronic transmission of voice, fax, or data, between distant parties. The history of telephony is intimately linked to the invention and development of the telephone. Telephony is commonly referred to as the construction or operation of telephones and telephonic systems and as a system of telecommunications in which telephonic equipment is employed in the transmission of speech or other sound between points, with or without the use of wires. The term is also used frequently to refer to computer hardware, software, and computer network systems, that perform functions traditionally performed by telephone equipment. In this context the technology is specifically referred to as Internet telephony, or voice over Internet Protocol (VoIP). Overview The first telephones were connected directly in pairs: each user had a separate telephone wire ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Crossover Cable
A crossover cable connects two devices of the same type, for example Data terminal equipment, DTE-DTE or Data circuit-terminating equipment, DCE-DCE, usually connected asymmetrically (DTE-DCE), by a modified electrical cable, cable called a crosslink. Such a distinction between devices was introduced by IBM. The crossing of wires in a cable or in a connector adaptor allows: * connecting two devices directly, output of one to input of the other, * letting two terminal (DTE) devices communicate without an interconnecting Ethernet hub, hub knot, i.e. Personal computer, PCs, * linking two or more hubs, Network switch, switches or Router (computing), routers (DCE) together, possibly to work as one wider device. In contrast, a straight-through cable uses direct wiring to connect complementary devices, e.g. a PC to a switch. Concept Straight-through cables are used for most applications, but crossover cables are required in others. In a straight-through cable, pins on one end corres ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Null Modem
Null modem is a communication method to directly connect two data terminal equipment, DTEs (computer, computer terminal, terminal, printer (computing), printer, etc.) using an RS-232 serial cable. The name stems from the historical use of RS-232 cables to connect two teleprinter devices or two modems in order to communicate with one another; ''null modem'' communication refers to using a crossed-over RS-232 cable to connect the teleprinters directly to one another without the modems. It is also used to serially connect a computer to a printer, since both are data terminal equipment, DTE, and is known as a ''Printer Cable''. The RS-232 standard is asymmetric as to the definitions of the two ends of the communications link, assuming that one end is a data terminal equipment, DTE and the other is a Data circuit-terminating equipment, DCE, e.g. a modem. With a null modem connection the Transmission (telecommunications), transmit and receive lines are crosslinked. Depending on the pur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Phone Connector (audio)
A phone connector is a family of Cylinder, cylindrically-shaped electrical connectors primarily for Analog signal, analog audio signals. Invented in the late 19th century for Telephone switchboard, tele''phone'' switchboards, the phone connector remains in use for interfacing wired audio equipment, such as Headphone, head''phones'', Loudspeaker, speakers, Microphone, micro''phones'', mixing consoles, and electronic musical instruments (e.g. electric guitars, Electronic keyboard, keyboards, and effects units). A Gender of connectors and fasteners, ''male'' connector (a plug), is mated into a ''female'' connector (a socket), though #Other terms, other terminology is used. Plugs have 2 to 5 electrical contacts. The tip contact is indented with a groove. The sleeve contact is nearest the (conductive or Insulator (electricity), insulated) handle. Contacts are insulated from each other by a band of non-conductive material. Between the tip and sleeve are 0 to 3 ring contacts. Since ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Speakon Connector
The Speakon (stylized speakON) is a trademarked name for an electrical connector, originally manufactured by Neutrik, mostly used in professional audio systems for connecting loudspeakers to amplifiers. Other manufacturers make compatible products, often under the name "speaker twist connector". Speakon connectors are rated for at least 30 A RMS continuous current, higher than 1/4-inch TS phone connectors, two-pole twist lock, and XLR connectors for loudspeakers. Design A Speakon connector is designed with a locking system that may be designed for soldered or screw-type connections. Line connectors (usually FEMALE with the latch) mate with (usually MALE) panel connectors and typically a cable will have identical connectors at both ends. If it is needed to join cables, a coupler can be used (which essentially consists of two panel connectors mounted on the ends of a plastic tube). The design was conceived in 1987. Note that MANY users and even connector suppliers are confus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
RCA Connector
The RCA connector is a type of electrical connector commonly used to carry analog audio and video signals. The name refers to the popular name of Radio Corporation of America, which introduced the design in the 1930s. Typically, the output is a plug type connector and the input a jack type connector. These are referred to as RCA plug and RCA jack respectively. It is also called a phono connector, referring to its early use to connect a phonograph turntable to a radio receiver. As home audio systems became more complex, RCA cables became a standard way to connect components such as radio receivers, amplifiers, turntables, tape decks, and CD players. Their ubiquity led to them also being used for video: connecting analog televisions, videocassette recorders, DVD players, and game consoles. They remain in use as a simple, widely supported means of connection. In some European countries such as France and Germany, the name ''cinch'' is still used as an antonomasia of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
XLR Connector
The XLR connector (also Cannon plug and Cannon connector) is a type of electrical connector primarily used in professional audio, video, and stage lighting equipment. XLR connectors are cylindrical, with three to seven connector pins, and are often employed for analog balanced audio interconnections, AES3 digital audio, portable intercom, DMX512 lighting control, and for low-voltage power supply. XLR connectors are part of the international standard for dimensions, International Electrotechnical Commission, IEC 61076-2-103. The XLR connector resembles the DIN connector, but is larger, more robust and physically incompatible. The generic term "XLR" began as a trademark of Cannon (company), Cannon Electric, with the letters standing for X model connector with an added "L"atch feature, and "R"esilient neoprene rubber surrounding the female contacts. History and manufacturers The XLR connector was invented by James H. Cannon#James H. Cannon, James H. Cannon, founder of the Cannon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Professional Audio
Professional audio, abbreviated as pro audio, refers to both an activity and a category of high-quality, studio-grade audio equipment. Typically it encompasses sound recording, sound reinforcement system setup and audio mixing, and studio music production by trained sound engineers, audio engineers, record producers, and audio technicians who work in live event support and recording using mixing consoles, recording equipment and sound reinforcement systems. Professional audio is differentiated from consumer- or home-oriented audio, which are typically geared toward listening in a non-commercial environment. Professional audio can include, but is not limited to broadcast radio, audio mastering in a recording studio, television studio, and sound reinforcement such as a live concert, DJ performances, audio sampling, public address system set up, sound reinforcement in movie theatres, and design and setup of piped music in hotels and restaurants. Professional audio equipment ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Computer Networking
A computer network is a collection of communicating computers and other devices, such as printers and smart phones. In order to communicate, the computers and devices must be connected by wired media like copper cables, optical fibers, or by wireless communication. The devices may be connected in a variety of network topologies. In order to communicate over the network, computers use agreed-on rules, called communication protocols, over whatever medium is used. The computer network can include personal computers, Server (computing), servers, networking hardware, or other specialized or general-purpose Host (network), hosts. They are identified by network addresses and may have hostnames. Hostnames serve as memorable labels for the nodes and are rarely changed after initial assignment. Network addresses serve for locating and identifying the nodes by communication protocols such as the Internet Protocol. Computer networks may be classified by many criteria, including the tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
RJ Connector
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] [Amazon] |
Female BNC Connector
An organism's sex is female (symbol: ♀) if it produces the ovum (egg cell), the type of gamete (sex cell) that fuses with the male gamete (sperm cell) during sexual reproduction. A female has larger gametes than a male. Females and males are results of the anisogamous reproduction system, wherein gametes are of different sizes (unlike isogamy where they are the same size). The exact mechanism of female gamete evolution remains unknown. In species that have males and females, sex-determination may be based on either sex chromosomes, or environmental conditions. Most female mammals, including female humans, have two X chromosomes. Characteristics of organisms with a female sex vary between different species, having different female reproductive systems, with some species showing characteristics secondary to the reproductive system, as with mammary glands in mammals. In humans, the word ''female'' can also be used to refer to gender in the social sense of gender role or g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
