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In telecommunications, RS-232, Recommended Standard 232 is a standard introduced in 1960 for serial communication transmission of data. [1]

97 relations: ASCII, Bell 202 modem, Bit, Bit error rate, Bit rate, Breakout box, Cambridge University Press, Capacitance, Character encoding, Clock signal, Computer, Computer mouse, Computer terminal, Crosstalk, Current loop, D-subminiature, Dallas Semiconductor, Data Carrier Detect, Data circuit-terminating equipment, Data signaling rate, Data terminal equipment, Data Terminal Ready, Dial-up Internet access, Differential signaling, Digital current loop interface, Digital Data Communications Message Protocol, Distinctive ring, Duplex (telecommunications), EBCDIC, EIA-530, Electromagnetic interference, Electronic Industries Alliance, Embedded system, Ethernet, Fishfinder, Flow control (data), Gender changer, Global Positioning System, Ground loop (electricity), Handshaking, Headless computer, High-Level Data Link Control, International Telecommunication Union, Interrupt, ITU-T, Logic analyzer, Logic level, Loopback, Microsoft, Microsoft Press, ..., MIL-STD-188, Modem, Modular connector, Motherboard, National Instruments, National Semiconductor, NMEA 0183, Null modem, Numerical control, Operating system, Opto-isolator, Oscilloscope, PC System Design Guide, Personal computer, Pinout, Plug compatible, Point of sale, Printer (computing), Programmable logic controller, Router (computing), RS-232, RS-422, RS-423, RS-449, RS-485, Serial communication, Serial port, Server (computing), Servo drive, Short circuit, Single-ended signaling, Slew rate, Synchronous Data Link Control, System console, Technical standard, Telecommunication, Telecommunications Industry Association, Teleprinter, Texas Instruments, The Art of Electronics, Time series, Unbalanced line, Uninterruptible power supply, USB, Variable-frequency drive, Wake-on-ring, X.25. Expand index (47 more) »


ASCII, abbreviated from American Standard Code for Information Interchange, is a character encoding standard for electronic communication.

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Bell 202 modem

The Bell 202 modem was an early (1976) modem standard developed by the Bell System.

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The bit (a portmanteau of binary digit) is a basic unit of information used in computing and digital communications.

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Bit error rate

In digital transmission, the number of bit errors is the number of received bits of a data stream over a communication channel that have been altered due to noise, interference, distortion or bit synchronization errors.

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Bit rate

In telecommunications and computing, bit rate (bitrate or as a variable R) is the number of bits that are conveyed or processed per unit of time.

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Breakout box

A breakout box is a critical piece of electrical test equipment used to support integration testing, expedite maintenance, and streamline the troubleshooting process at the system, subsystem, and component level by simplifying the access to test signals.

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Cambridge University Press

Cambridge University Press (CUP) is the publishing business of the University of Cambridge.

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Capacitance is the ratio of the change in an electric charge in a system to the corresponding change in its electric potential.

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Character encoding

Character encoding is used to represent a repertoire of characters by some kind of encoding system.

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Clock signal

In electronics and especially synchronous digital circuits, a clock signal is a particular type of signal that oscillates between a high and a low state and is used like a metronome to coordinate actions of digital circuits.

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A computer is a device that can be instructed to carry out sequences of arithmetic or logical operations automatically via computer programming.

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Computer mouse

A computer mouse is a hand-held pointing device that detects two-dimensional motion relative to a surface.

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Computer terminal

A computer terminal is an electronic or electromechanical hardware device that is used for entering data into, and displaying or printing data from, a computer or a computing system.

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In electronics, crosstalk is any phenomenon by which a signal transmitted on one circuit or channel of a transmission system creates an undesired effect in another circuit or channel.

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Current loop

In electrical signalling an analog current loop is used where a device must be monitored or controlled remotely over a pair of conductors.

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The D-subminiature or D-sub is a common type of electrical connector.

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Dallas Semiconductor

Dallas Semiconductor, acquired by Maxim Integrated Products in 2001, designed and manufactured analog, digital, and mixed-signal semiconductors (integrated circuits, or ICs).

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Data Carrier Detect

Data Carrier Detect, abbreviated as DCD, or alternately Carrier Detect abbreviated as CD, is a control signal present inside an RS-232 serial communications cable that goes between a computer and another device, such as a modem.

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Data circuit-terminating equipment

A data circuit-terminating equipment (DCE) is a device that sits between the data terminal equipment (DTE) and a data transmission circuit.

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Data signaling rate

In telecommunication, data signaling rate (DSR), also known as gross bit rate, is the aggregate rate at which data pass a point in the transmission path of a data transmission system.

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Data terminal equipment

Data terminal equipment (DTE) is an end instrument that converts user information into signals or reconverts received signals.

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Data Terminal Ready

Data Terminal Ready (DTR) is a control signal in RS-232 serial communications, transmitted from data terminal equipment (DTE), such as a computer, to data communications equipment (DCE), for example a modem, to indicate that the terminal is ready for communications and the modem may initiate a communications channel.

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Dial-up Internet access

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.

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Differential signaling

Differential signaling is a method for electrically transmitting information using two complementary signals.

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Digital current loop interface

For serial communications, a current loop is a communication interface that uses current instead of voltage for signaling.

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Digital Data Communications Message Protocol

Digital Data Communications Message Protocol (DDCMP) is a byte-oriented communications protocol devised by Digital Equipment Corporation in 1974 to allow communication over point-to-point network links for the company's DECnet Phase I network protocol suite.

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Distinctive ring

Distinctive ring, marketed under a variety of names, is a service offered by a telephone company that establishes additional telephone numbers on the same line as an existing number, each number ringing with a distinctive ringing pattern.

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Duplex (telecommunications)

A duplex communication system is a point-to-point system composed of two or more connected parties or devices that can communicate with one another in both directions.

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Extended Binary Coded Decimal Interchange Code (EBCDIC) is an eight-bit character encoding used mainly on IBM mainframe and IBM midrange computer operating systems.

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Currently known as TIA-530-A, but often called EIA-530, or RS-530, is a balanced serial interface standard that generally uses a 25-pin connector, originally created by the Telecommunications Industry Association.

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Electromagnetic interference

Electromagnetic interference (EMI), also called radio-frequency interference (RFI) when in the radio frequency spectrum, is a disturbance generated by an external source that affects an electrical circuit by electromagnetic induction, electrostatic coupling, or conduction.

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Electronic Industries Alliance

The Electronic Industries Alliance (EIA; until 1997 Electronic Industries Association) was a standards and trade organization composed as an alliance of trade associations for electronics manufacturers in the United States.

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Embedded system

An embedded system is a computer system with a dedicated function within a larger mechanical or electrical system, often with real-time computing constraints.

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Ethernet is a family of computer networking technologies commonly used in local area networks (LAN), metropolitan area networks (MAN) and wide area networks (WAN).

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A fishfinder or sounder (Australia) is an instrument used to locate fish underwater by detecting reflected pulses of sound energy, as in sonar.

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Flow control (data)

In data communications, flow control is the process of managing the rate of data transmission between two nodes to prevent a fast sender from overwhelming a slow receiver.

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Gender changer

A gender changer or "gender-bender", is a hardware device placed between two cable connectors of the same type and gender.

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Global Positioning System

The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radionavigation system owned by the United States government and operated by the United States Air Force.

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Ground loop (electricity)

In an electrical system, a ground loop or earth loop occurs when two points of a circuit both intended to be at ground reference potential have a potential between them.

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In telecommunications, a handshake is an automated process of negotiation between two communicating participants (example "Alice and Bob") through the exchange of information that establishes the protocols of a communication link at the start of the communication, before full communication begins.

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Headless computer

A headless system is a computer system or device that has been configured to operate without a monitor (the missing "head"), keyboard, and mouse.

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High-Level Data Link Control

High-Level Data Link Control (HDLC) is a bit-oriented code-transparent synchronous data link layer protocol developed by the International Organization for Standardization (ISO).

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International Telecommunication Union

The International Telecommunication Union (ITU; Union Internationale des Télécommunications (UIT)), originally the International Telegraph Union (Union Télégraphique Internationale), is a specialized agency of the United Nations (UN) that is responsible for issues that concern information and communication technologies.

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In system programming, an interrupt is a signal to the processor emitted by hardware or software indicating an event that needs immediate attention.

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The ITU Telecommunication Standardization Sector (ITU-T) is one of the three sectors (divisions or units) of the International Telecommunication Union (ITU); it coordinates standards for telecommunications.

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Logic analyzer

A logic analyzer is an electronic instrument that captures and displays multiple signals from a digital system or digital circuit.

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Logic level

In digital circuits, a logic level is one of a finite number of states that a digital signal can inhabit.

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Loopback, or loop-back, refers to the routing of electronic signals, digital data streams, or flows of items back to their source without intentional processing or modification.

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Microsoft Corporation (abbreviated as MS) is an American multinational technology company with headquarters in Redmond, Washington.

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Microsoft Press

Microsoft Press is the publishing arm of Microsoft, usually releasing books dealing with various current Microsoft technologies.

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MIL-STD-188 is a series of U.S. military standards relating to telecommunications.

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A modem (modulator–demodulator) is a network hardware device that modulates one or more carrier wave signals to encode digital information for transmission and demodulates signals to decode the transmitted information.

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Modular connector

A modular connector is an electrical connector that was originally designed for use in telephone wiring, but has since been used for many other purposes.

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A motherboard (sometimes alternatively known as the mainboard, system board, baseboard, planar board or logic board, or colloquially, a mobo) is the main printed circuit board (PCB) found in general purpose microcomputers and other expandable systems.

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National Instruments

National Instruments Corporation, or NI, is an American multinational company with international operation.

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National Semiconductor

National Semiconductor was an American semiconductor manufacturer which specialized in analog devices and subsystems, formerly with headquarters in Santa Clara, California, United States.

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NMEA 0183

NMEA 0183 is a combined electrical and data specification for communication between marine electronics such as echo sounder, sonars, anemometer, gyrocompass, autopilot, GPS receivers and many other types of instruments.

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Null modem

Null modem is a communication method to directly connect two DTEs (computer, terminal, printer, etc.) using an RS-232 serial cable.

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Numerical control

Computer numerical control (CNC) is the automation of machine tools by means of computers executing pre-programmed sequences of machine control commands.

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Operating system

An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs.

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In electronics, an opto-isolator, also called an optocoupler, photocoupler, or optical isolator, is a component that transfers electrical signals between two isolated circuits by using light.

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An oscilloscope, previously called an oscillograph, and informally known as a scope or o-scope, CRO (for cathode-ray oscilloscope), or DSO (for the more modern digital storage oscilloscope), is a type of electronic test instrument that allows observation of varying signal voltages, usually as a two-dimensional plot of one or more signals as a function of time.

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PC System Design Guide

The PC System Design Guide (also known as the PC 97, PC 98, PC 99, or PC 2001 specification) is a series of hardware design requirements and recommendations for IBM PC compatible personal computers, compiled by Microsoft and Intel Corporation during 1997–2001.

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Personal computer

A personal computer (PC) is a multi-purpose computer whose size, capabilities, and price make it feasible for individual use.

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In electronics, a pinout (sometimes written "pin-out") is a cross-reference between the contacts, or pins, of an electrical connector or electronic component, and their functions.

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Plug compatible

Plug compatible refers to "hardware that is designed to perform exactly like another vendor's product." The term PCM can refer to.

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Point of sale

The point of sale (POS) or point of purchase (POP) is the time and place where a retail transaction is completed.

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Printer (computing)

In computing, a printer is a peripheral device which makes a persistent human-readable representation of graphics or text on paper.

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Programmable logic controller

A programmable logic controller (PLC), or programmable controller is an industrial digital computer which has been ruggedized and adapted for the control of manufacturing processes, such as assembly lines, or robotic devices, or any activity that requires high reliability control and ease of programming and process fault diagnosis.

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Router (computing)

A router is a networking device that forwards data packets between computer networks.

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In telecommunications, RS-232, Recommended Standard 232 is a standard introduced in 1960 for serial communication transmission of data.

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RS-422, also known as TIA/EIA-422, is a technical standard originated by the Electronic Industries Alliance that specifies electrical characteristics of a digital signaling circuit.

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RS/EIA/TIA-423 is a standard for serial communications.

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The RS-449 specification, also known as EIA-449 or TIA-449, defines the functional and mechanical characteristics of the interface between data terminal equipment and data communications equipment.

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RS-485, also known as TIA-485(-A), EIA-485, is a standard defining the electrical characteristics of drivers and receivers for use in serial communications systems. Electrical signaling is balanced, and multipoint systems are supported. The standard is jointly published by the Telecommunications Industry Association and Electronic Industries Alliance (TIA/EIA). Digital communications networks implementing the standard can be used effectively over long distances and in electrically noisy environments. Multiple receivers may be connected to such a network in a linear, multidrop bus. These characteristics make RS-485 useful in industrial control systems and similar applications.

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Serial communication

In telecommunication and data transmission, serial communication is the process of sending data one bit at a time, sequentially, over a communication channel or computer bus.

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Serial port

In computing, a serial port is a serial communication interface through which information transfers in or out one bit at a time (in contrast to a parallel port).

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Server (computing)

In computing, a server is a computer program or a device that provides functionality for other programs or devices, called "clients".

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Servo drive

A servo drive is a special electronic amplifier used to power electric servomechanisms.

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Short circuit

A short circuit (sometimes abbreviated to short or s/c) is an electrical circuit that allows a current to travel along an unintended path with no or a very low electrical impedance.

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Single-ended signaling

Single-ended signaling is the simplest and most commonly used method of transmitting electrical signals over wires.

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Slew rate

In electronics, slew rate is defined as the change of voltage or current, or any other electrical quantity, per unit of time.

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Synchronous Data Link Control

Synchronous Data Link Control (SDLC) is a computer communications protocol.

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System console

The system console, computer console, root console, operator's console, or simply console is the text entry and display device for system administration messages, particularly those from the BIOS or boot loader, the kernel, from the init system and from the system logger.

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Technical standard

A technical standard is an established norm or requirement in regard to technical systems.

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Telecommunication is the transmission of signs, signals, messages, words, writings, images and sounds or information of any nature by wire, radio, optical or other electromagnetic systems.

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Telecommunications Industry Association

The Telecommunications Industry Association (TIA) is accredited by the American National Standards Institute (ANSI) to develop voluntary, consensus-based industry standards for a wide variety of Information and Communication Technologies (ICT) products, and currently represents nearly 400 companies.

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A teleprinter (teletypewriter, Teletype or TTY) is an electromechanical typewriter that can be used to send and receive typed messages through various communications channels, in both point-to-point and point-to-multipoint configurations.

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Texas Instruments

Texas Instruments Inc. (TI) is an American technology company that designs and manufactures semiconductors and various integrated circuits, which it sells to electronics designers and manufacturers globally.

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The Art of Electronics

The Art of Electronics, by Paul Horowitz and Winfield Hill, is a popular textbook dealing with analog and digital electronics.

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Time series

A time series is a series of data points indexed (or listed or graphed) in time order.

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Unbalanced line

In electrical engineering, an unbalanced line is a transmission line, often coaxial cable, whose conductors have unequal impedances with respect to ground; as opposed to a balanced line.

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Uninterruptible power supply

An uninterruptible power supply or uninterruptible power source (UPS) is an electrical apparatus that provides emergency power to a load when the input power source or mains power fails.

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USB (abbreviation of Universal Serial Bus), is an industry standard that was developed to define cables, connectors and protocols for connection, communication, and power supply between personal computers and their peripheral devices.

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Variable-frequency drive

A variable-frequency drive (VFD; also termed adjustable-frequency drive, “variable-voltage/variable-frequency (VVVF) drive”, variable speed drive, AC drive, micro drive or inverter drive) is a type of adjustable-speed drive used in electro-mechanical drive systems to control AC motor speed and torque by varying motor input frequency and voltage.

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Wake-on-Ring (WOR), sometimes referred to as Wake-on-Modem (WOM), is a specification that allows supported computers and devices to "wake up" or turn on from a sleeping, hibernating or "soft off" state (e.g. ACPI state G1 or G2), and begin operation.

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X.25 is an ITU-T standard protocol suite for packet switched wide area network (WAN) communication.

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Redirects here:

ANSI EIA/TIA-232, ANSI TIA-232, ANSI/TIA-232-F-1997, ANSI/TIA-232-F-1997 (R2002), CCITT V.24, Data Set Ready, Data set ready, EIA EIA-232-D, EIA RS-232, EIA RS-232-A, EIA RS-232-B, EIA RS-232-C, EIA--232, EIA-232, EIA-232-D, EIA/TIA-232, EIA/TIA-232-F, EIA/TIA-232-F:1997-10, EIA/TIA-574, EIA232, Eia Rs-232C, ITU-T V.24, ITU-T/CCITT V.24, Interface Between Data Terminal Equipment and Data Circuit-Terminating Equipment Employing Serial Binary Data Interchange, Interface between data terminal equipment and data circuit-terminating equipment employing serial binary data interchange, RS 232, RS-232 RTS/CTS, RS-232 devices, RS-232 flow control, RS-232 flow-control, RS-232-A, RS-232-B, RS-232-C, RS-232C, RS-232c, RS232, RS232C, RS232c, Ring Indicator, Ring indicator, Rs 232, Rs-232, Rs-232C, Rs-232c, Rs232, Rs232C, Rs232c, TIA EIA/TIA-232-F, TIA EIA/TIA-232-F:1997-10, TIA TIA-232-F, TIA TIA-232-F-1997 (R2012), TIA-232, TIA-232-E, TIA-232-E:1991, TIA-232-F, TIA-232-F-1997 (R2012), TIA-574, TIA/EIA-232-E, TIA/EIA-232-F, V.24.


[1] https://en.wikipedia.org/wiki/RS-232

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