Get it on Google Play
New! Download Unionpedia on your Android™ device!
Faster access than browser!


Index Modem

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. [1]

194 relations: Acer Inc., Acoustic coupler, Amazon Silk, Analog-to-digital converter, AOL, Apple II, Application-specific integrated circuit, Asymmetric digital subscriber line, AT&T, Bandwidth (signal processing), Baseband, Baud, BBN Technologies, Bell 101 modem, Bell 103 modem, Bell 202 modem, Bell 212A, Bell Labs, Bit rate, Broadband, Bulletin board system, Business telephone system, Cable modem, CAN bus, Canada, Carrier frequency, Carrier wave, Carterfone, CBBS, Chipset, Cisco Systems, Coaxial cable, Codie award, Command and Data modes (modem), Computer, Computer hardware, Computer network, Conexant, Consumer Technology Association, Convolutional code, Creative Technology, Current loop, CXR Anderson Jacobson, Data-rate units, Dave Forney, DC-BUS, Demodulation, Device driver, Dial-up Internet access, Dialer, ..., Diamond Multimedia, Digital data, Digital Signal 0, Digital signal processor, Digital-to-analog converter, Duplex (telecommunications), Dynamic Host Configuration Protocol, Electronic serial number, Email, Ethernet, Ethernet over coax, Evolution-Data Optimized, Expansion card, ExpressCard, Fall back and forward, Fax, Fax demodulator, FidoNet, File transfer, Firewall (computing), Flat rate, Foreign exchange service (telecommunications), Forward error correction, Frequency-division multiple access, Frequency-shift keying, G.hn, General Packet Radio Service, Gottfried Ungerboeck, GSM, Handshaking, Harmonic, Hayes command set, Hayes Microcomputer Products, Hertz, High Speed Packet Access, Huawei E220, IBM 2741, IBM Research, IEEE 802.11, Image file formats, International Telecommunication Union, Internet, Internet service provider, ITU-T, Laptop, Light-emitting diode, Linux, List of interface bit rates, List of ITU-T V-series recommendations, Local area network, Local Interconnect Network, Lucent, Microcomputer, Microcontroller, Microsoft Windows, Microwave, Minitel, Mobile broadband, Mobile broadband modem, Mobile phone, Modulation, Motorola, Multiplexing, Multiprotocol Encapsulation over ATM, Netgear, Network address translation, Networking hardware, News agency, Noisy-channel coding theorem, Notebook, Novation CAT, Null modem, Online service provider, Opera (web browser), Orthogonal frequency-division multiplexing, PC Card, Pennywhistle modem, Personal Computer Memory Card International Association, Phase-shift keying, Power-line communication, Prentice, Public switched telephone network, Pulse-code modulation, Quadrature amplitude modulation, Racal, Radio, Radio modem, RadioShack, Registered jack, Removable User Identity Module, Residential gateway, Rockwell International, Router (computing), RS-232, S-100 bus, Satellite modem, Satellite television, Semi-Automatic Ground Environment, Serial Peripheral Interface, Serial port, Server (computing), Signal, SIGSALY, Software, Sphere packing, SRI International, StarTech.com, Subscriber identity module, Subsidy Password, Supra, Inc., SupraFAXModem 14400, Symbol rate, Sysop, Telebit, Telegraphy, Telephone exchange, Telephone line, Telephony, Teleprinter, Teletype Model 33, TP-Link, Trellis modulation, Twisted pair, UMTS, Unit of time, Universal asynchronous receiver-transmitter, Unix, USB, USRobotics, UUCP, V.92, Viterbi algorithm, Vocoder, Voice modem command set, Wake-on-ring, Western Electric, Wi-Fi, Wikibooks, WiMAX, Yamar Electronics, Zoom Telephonics, Zyxel, 3Com, 56 kbit/s line. Expand index (144 more) »

Acer Inc.

Acer Inc. (lit. Hongji Corporation Ltd.) is a Taiwanese multinational hardware and electronics corporation, specializing in advanced electronics technology, headquartered in Xizhi, New Taipei City, Taiwan.

New!!: Modem and Acer Inc. · See more »

Acoustic coupler

In telecommunications, an acoustic coupler is an interface device for coupling electrical signals by acoustical means—usually into and out of a telephone.

New!!: Modem and Acoustic coupler · See more »

Amazon Silk

Amazon Silk is a web browser developed by Amazon.

New!!: Modem and Amazon Silk · See more »

Analog-to-digital converter

In electronics, an analog-to-digital converter (ADC, A/D, or A-to-D) is a system that converts an analog signal, such as a sound picked up by a microphone or light entering a digital camera, into a digital signal.

New!!: Modem and Analog-to-digital converter · See more »


AOL (formerly a company known as AOL Inc., originally known as America Online, and stylized as Aol.) is a web portal and online service provider based in New York.

New!!: Modem and AOL · See more »

Apple II

The Apple II (stylized as Apple.

New!!: Modem and Apple II · See more »

Application-specific integrated circuit

An Application-Specific Integrated Circuit (ASIC), is an integrated circuit (IC) customized for a particular use, rather than intended for general-purpose use.

New!!: Modem and Application-specific integrated circuit · See more »

Asymmetric digital subscriber line

Asymmetric digital subscriber line (ADSL) is a type of digital subscriber line (DSL) technology, a data communications technology that enables faster data transmission over copper telephone lines than a conventional voiceband modem can provide.

New!!: Modem and Asymmetric digital subscriber line · See more »


AT&T Inc. is an American multinational conglomerate holding company headquartered at Whitacre Tower in Downtown Dallas, Texas.

New!!: Modem and AT&T · See more »

Bandwidth (signal processing)

Bandwidth is the difference between the upper and lower frequencies in a continuous band of frequencies.

New!!: Modem and Bandwidth (signal processing) · See more »


Baseband is a signal that has a very narrow and near-zero frequency range, i.e. a spectral magnitude that is nonzero only for frequencies in the vicinity of the origin (termed f.

New!!: Modem and Baseband · See more »


In telecommunication and electronics, baud (symbol: Bd) is a common measure of the speed of communication over a data channel.

New!!: Modem and Baud · See more »

BBN Technologies

BBN Technologies (originally Bolt, Beranek and Newman) is an American high-technology company which provides research and development services.

New!!: Modem and BBN Technologies · See more »

Bell 101 modem

The Bell 101 dataset or Bell 101 modem was the first commercial modem for computers, released by AT&T Corporation in 1958 for use by SAGE and in 1959 made commercial shortly after AT&T's Bell Labs announced their 110 baud modulation frequencies.

New!!: Modem and Bell 101 modem · See more »

Bell 103 modem

The Bell 103 modem or Bell 103 dataset was the second commercial modem for computers, released by AT&T Corporation in 1962.

New!!: Modem and Bell 103 modem · See more »

Bell 202 modem

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

New!!: Modem and Bell 202 modem · See more »

Bell 212A

The Bell 212A modulation scheme defined a standard method of transmitting full-duplex asynchronous serial data at 1.2 kbit/s over analogue transmission lines.

New!!: Modem and Bell 212A · See more »

Bell Labs

Nokia Bell Labs (formerly named AT&T Bell Laboratories, Bell Telephone Laboratories and Bell Labs) is an American research and scientific development company, owned by Finnish company Nokia.

New!!: Modem and Bell Labs · See more »

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.

New!!: Modem and Bit rate · See more »


In telecommunications, broadband is wide bandwidth data transmission which transports multiple signals and traffic types.

New!!: Modem and Broadband · See more »

Bulletin board system

A bulletin board system or BBS (also called Computer Bulletin Board Service, CBBS) is a computer server running software that allows users to connect to the system using a terminal program.

New!!: Modem and Bulletin board system · See more »

Business telephone system

A business telephone system is a multiline telephone system typically used in business environments, encompassing systems ranging from small key telephone systems to large-scale private branch exchanges.

New!!: Modem and Business telephone system · See more »

Cable modem

A cable modem is a type of network bridge that provides bi-directional data communication via radio frequency channels on a hybrid fibre-coaxial (HFC) and radio frequency over glass (RFoG) infrastructure.

New!!: Modem and Cable modem · See more »

CAN bus

A Controller Area Network (CAN bus) is a robust vehicle bus standard designed to allow microcontrollers and devices to communicate with each other in applications without a host computer.

New!!: Modem and CAN bus · See more »


Canada is a country located in the northern part of North America.

New!!: Modem and Canada · See more »

Carrier frequency

In telecommunication systems, Carrier frequency is a technical term used to indicate.

New!!: Modem and Carrier frequency · See more »

Carrier wave

In telecommunications, a carrier wave, carrier signal, or just carrier, is a waveform (usually sinusoidal) that is modulated (modified) with an input signal for the purpose of conveying information.

New!!: Modem and Carrier wave · See more »


The Carterfone is a device invented by Thomas Carter.

New!!: Modem and Carterfone · See more »


CBBS (Computerized Bulletin Board System) was a computer program created by Ward Christensen to allow him and other computer hobbyists to exchange information between each another.

New!!: Modem and CBBS · See more »


In a computer system, a chipset is a set of electronic components in an integrated circuit known as a "Data Flow Management System" that manages the data flow between the processor, memory and peripherals.

New!!: Modem and Chipset · See more »

Cisco Systems

Cisco Systems, Inc. is an American multinational technology conglomerate headquartered in San Jose, California, in the center of Silicon Valley, that develops, manufactures and sells networking hardware, telecommunications equipment and other high-technology services and products.

New!!: Modem and Cisco Systems · See more »

Coaxial cable

Cross-sectional view of a coaxial cable Coaxial cable, or coax (pronounced), is a type of electrical cable that has an inner conductor surrounded by a tubular insulating layer, surrounded by a tubular conducting shield.

New!!: Modem and Coaxial cable · See more »

Codie award

The CODiE Awards are annual awards given within the software industry.

New!!: Modem and Codie award · See more »

Command and Data modes (modem)

Command and Data modes refer to the two modes in which a computer modem may operate.

New!!: Modem and Command and Data modes (modem) · See more »


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

New!!: Modem and Computer · See more »

Computer hardware

Computer hardware includes the physical parts or components of a computer, such as the central processing unit, monitor, keyboard, computer data storage, graphic card, sound card and motherboard.

New!!: Modem and Computer hardware · See more »

Computer network

A computer network, or data network, is a digital telecommunications network which allows nodes to share resources.

New!!: Modem and Computer network · See more »


Conexant Systems, Inc. was an American-based software developer and fabless semiconductor company.

New!!: Modem and Conexant · See more »

Consumer Technology Association

The Consumer Technology Association (CTA), formerly Consumer Electronics Association (CEA), is a standards and trade organization for the consumer electronics industry in the United States.

New!!: Modem and Consumer Technology Association · See more »

Convolutional code

In telecommunication, a convolutional code is a type of error-correcting code that generates parity symbols via the sliding application of a boolean polynomial function to a data stream.

New!!: Modem and Convolutional code · See more »

Creative Technology

Creative Technology Ltd. is a Singapore-based global company headquartered in Jurong East, Singapore.

New!!: Modem and Creative Technology · See more »

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.

New!!: Modem and Current loop · See more »

CXR Anderson Jacobson

CXR Anderson Jacobson, also known as CXR Networks, is a vendor of communications equipment.

New!!: Modem and CXR Anderson Jacobson · See more »

Data-rate units

In telecommunications, data-transfer rate is the average number of bits (bitrate), characters or symbols (baudrate), or data blocks per unit time passing through a communication link in a data-transmission system.

New!!: Modem and Data-rate units · See more »

Dave Forney

George David "Dave" Forney, Jr. (born March 6, 1940) is an American electrical engineer who made contributions in telecommunication system theory, specifically in coding theory and information theory.

New!!: Modem and Dave Forney · See more »


DC-BUS is technology for reliable and economical communication over noisy DC or AC power lines.

New!!: Modem and DC-BUS · See more »


Demodulation is extracting the original information-bearing signal from a carrier wave.

New!!: Modem and Demodulation · See more »

Device driver

In computing, a device driver is a computer program that operates or controls a particular type of device that is attached to a computer.

New!!: Modem and Device driver · See more »

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.

New!!: Modem and Dial-up Internet access · See more »


A dialer (American English) or dialler (British English) is an electronic device that is connected to a telephone line to monitor the dialed numbers and alter them to seamlessly provide services that otherwise require lengthy National or International access codes to be dialed.

New!!: Modem and Dialer · See more »

Diamond Multimedia

Diamond Multimedia is an American company that specializes in many forms of multimedia technology.

New!!: Modem and Diamond Multimedia · See more »

Digital data

Digital data, in information theory and information systems, is the discrete, discontinuous representation of information or works.

New!!: Modem and Digital data · See more »

Digital Signal 0

Digital Signal 0 (DS0) is a basic digital signaling rate of 64 kilobits per second (kbit/s), corresponding to the capacity of one analog voice-frequency-equivalent communication channel.

New!!: Modem and Digital Signal 0 · See more »

Digital signal processor

A digital signal processor (DSP) is a specialized microprocessor (or a SIP block), with its architecture optimized for the operational needs of digital signal processing.

New!!: Modem and Digital signal processor · See more »

Digital-to-analog converter

In electronics, a digital-to-analog converter (DAC, D/A, D2A, or D-to-A) is a system that converts a digital signal into an analog signal.

New!!: Modem and Digital-to-analog converter · See more »

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.

New!!: Modem and Duplex (telecommunications) · See more »

Dynamic Host Configuration Protocol

The Dynamic Host Configuration Protocol (DHCP) is a network management protocol used on UDP/IP networks whereby a DHCP server dynamically assigns an IP address and other network configuration parameters to each device on a network so they can communicate with other IP networks.

New!!: Modem and Dynamic Host Configuration Protocol · See more »

Electronic serial number

Electronic serial numbers (ESNs) were created by the U.S. Federal Communications Commission (FCC) to uniquely identify mobile devices, from the days of AMPS in the United States starting in the early 1980s.

New!!: Modem and Electronic serial number · See more »


Electronic mail (email or e-mail) is a method of exchanging messages ("mail") between people using electronic devices.

New!!: Modem and Email · See more »


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

New!!: Modem and Ethernet · See more »

Ethernet over coax

Ethernet over Coax (EoC) is a family of technologies that supports the transmission of Ethernet frames over coaxial cable.

New!!: Modem and Ethernet over coax · See more »

Evolution-Data Optimized

Evolution-Data Optimized (EV-DO, EVDO, etc.) is a telecommunications standard for the wireless transmission of data through radio signals, typically for broadband Internet access.

New!!: Modem and Evolution-Data Optimized · See more »

Expansion card

In computing, the expansion card, expansion board, adapter card or accessory card is a printed circuit board that can be inserted into an electrical connector, or expansion slot, on a computer motherboard, backplane or riser card to add functionality to a computer system via the expansion bus.

New!!: Modem and Expansion card · See more »


ExpressCard, initially called NEWCARD, is an interface to connect peripheral devices to a computer, usually a laptop computer.

New!!: Modem and ExpressCard · See more »

Fall back and forward

Fall back is a feature of a modem protocol in data communication whereby two communicating modems which experience data corruption (due to line noise, for example) can renegotiate with each other to use a lower-speed connection.

New!!: Modem and Fall back and forward · See more »


Fax (short for facsimile), sometimes called telecopying or telefax (the latter short for telefacsimile), is the telephonic transmission of scanned printed material (both text and images), normally to a telephone number connected to a printer or other output device.

New!!: Modem and Fax · See more »

Fax demodulator

A fax demodulator is a device used to intercept fax messages by listening in on a telephone line or radio signal.

New!!: Modem and Fax demodulator · See more »


Traditional FidoNet logo by John Madil FidoNet is a worldwide computer network that is used for communication between bulletin board systems (BBSes).

New!!: Modem and FidoNet · See more »

File transfer

File transfer is the transmission of a computer file through a communication channel from one computer system to another.

New!!: Modem and File transfer · See more »

Firewall (computing)

In computing, a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.

New!!: Modem and Firewall (computing) · See more »

Flat rate

A flat fee, also referred to as a flat rate or a linear rate, refers to a pricing structure that charges a single fixed fee for a service, regardless of usage.

New!!: Modem and Flat rate · See more »

Foreign exchange service (telecommunications)

Foreign exchange service (FX) is a telecommunications network service in which a telephone in a given exchange area is connected, via a private line (as opposed to a trunk line), to a telephone exchange or central office in another foreign exchange, rather than the local exchange area where the device is located.

New!!: Modem and Foreign exchange service (telecommunications) · See more »

Forward error correction

In telecommunication, information theory, and coding theory, forward error correction (FEC) or channel coding is a technique used for controlling errors in data transmission over unreliable or noisy communication channels.

New!!: Modem and Forward error correction · See more »

Frequency-division multiple access

Frequency division multiple access (FDMA) is a channel access method used in multiple-access protocols as a channelization protocol.

New!!: Modem and Frequency-division multiple access · See more »

Frequency-shift keying

Frequency-shift keying (FSK) is a frequency modulation scheme in which digital information is transmitted through discrete frequency changes of a carrier signal.

New!!: Modem and Frequency-shift keying · See more »


G.hn is a specification for home networking with data rates up to 2 Gbit/s and operation over four types of legacy wires: telephone wiring, coaxial cables, power lines and plastic optical fiber.

New!!: Modem and G.hn · See more »

General Packet Radio Service

General Packet Radio Service (GPRS) is a packet oriented mobile data standard on the 2G and 3G cellular communication network's global system for mobile communications (GSM).

New!!: Modem and General Packet Radio Service · See more »

Gottfried Ungerboeck

Gottfried Ungerboeck (born 15 March 1940, Vienna) is an Austrian communications engineer.

New!!: Modem and Gottfried Ungerboeck · See more »


GSM (Global System for Mobile communications) is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe the protocols for second-generation digital cellular networks used by mobile devices such as tablets, first deployed in Finland in December 1991.

New!!: Modem and GSM · See more »


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.

New!!: Modem and Handshaking · See more »


A harmonic is any member of the harmonic series, a divergent infinite series.

New!!: Modem and Harmonic · See more »

Hayes command set

The Hayes command set is a specific command language originally developed by Dennis Hayes for the Hayes Smartmodem 300 baud modem in 1981.

New!!: Modem and Hayes command set · See more »

Hayes Microcomputer Products

Hayes Microcomputer Products was a U.S.-based manufacturer of modems.

New!!: Modem and Hayes Microcomputer Products · See more »


The hertz (symbol: Hz) is the derived unit of frequency in the International System of Units (SI) and is defined as one cycle per second.

New!!: Modem and Hertz · See more »

High Speed Packet Access

High Speed Packet Access (HSPA) is an amalgamation of two mobile protocols, High Speed Downlink Packet Access (HSDPA) and High Speed Uplink Packet Access (HSUPA), that extends and improves the performance of existing 3G mobile telecommunication networks using the WCDMA protocols.

New!!: Modem and High Speed Packet Access · See more »

Huawei E220

The Huawei E220 is a Huawei HSDPA access device (modem) manufactured by Huawei and notable for using the USB interface (USB modem).

New!!: Modem and Huawei E220 · See more »

IBM 2741

The IBM 2741 is a printing computer terminal that was introduced in 1965.

New!!: Modem and IBM 2741 · See more »

IBM Research

IBM Research is IBM's research and development division.

New!!: Modem and IBM Research · See more »

IEEE 802.11

IEEE 802.11 is a set of media access control (MAC) and physical layer (PHY) specifications for implementing wireless local area network (WLAN) computer communication in the 900 MHz and 2.4, 3.6, 5, and 60 GHz frequency bands.

New!!: Modem and IEEE 802.11 · See more »

Image file formats

Image file formats are standardized means of organizing and storing digital images.

New!!: Modem and Image file formats · See more »

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.

New!!: Modem and International Telecommunication Union · See more »


The Internet is the global system of interconnected computer networks that use the Internet protocol suite (TCP/IP) to link devices worldwide.

New!!: Modem and Internet · See more »

Internet service provider

An Internet service provider (ISP) is an organization that provides services for accessing, using, or participating in the Internet.

New!!: Modem and Internet service provider · See more »


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.

New!!: Modem and ITU-T · See more »


A laptop, also called a notebook computer or just notebook, is a small, portable personal computer with a "clamshell" form factor, having, typically, a thin LCD or LED computer screen mounted on the inside of the upper lid of the "clamshell" and an alphanumeric keyboard on the inside of the lower lid.

New!!: Modem and Laptop · See more »

Light-emitting diode

A light-emitting diode (LED) is a two-lead semiconductor light source.

New!!: Modem and Light-emitting diode · See more »


Linux is a family of free and open-source software operating systems built around the Linux kernel.

New!!: Modem and Linux · See more »

List of interface bit rates

This is a list of interface bit rates, is a measure of information transfer rates, or digital bandwidth capacity, at which digital interfaces in a computer or network can communicate over various kinds of buses and channels.

New!!: Modem and List of interface bit rates · See more »

List of ITU-T V-series recommendations

The ITU-T V-Series Recommendations on Data communication over the telephone network specify the protocols that govern approved modem communication standards and interfaces.

New!!: Modem and List of ITU-T V-series recommendations · See more »

Local area network

A local area network (LAN) is a computer network that interconnects computers within a limited area such as a residence, school, laboratory, university campus or office building.

New!!: Modem and Local area network · See more »

Local Interconnect Network

LIN (Local Interconnect Network) is a serial network protocol used for communication between components in vehicles.

New!!: Modem and Local Interconnect Network · See more »


Lucent Technologies, Inc., was an American multinational telecommunications equipment company headquartered in Murray Hill, New Jersey, in the United States.

New!!: Modem and Lucent · See more »


A microcomputer is a small, relatively inexpensive computer with a microprocessor as its central processing unit (CPU).

New!!: Modem and Microcomputer · See more »


A microcontroller (MCU for microcontroller unit, or UC for μ-controller) is a small computer on a single integrated circuit.

New!!: Modem and Microcontroller · See more »

Microsoft Windows

Microsoft Windows is a group of several graphical operating system families, all of which are developed, marketed, and sold by Microsoft.

New!!: Modem and Microsoft Windows · See more »


Microwaves are a form of electromagnetic radiation with wavelengths ranging from one meter to one millimeter; with frequencies between and.

New!!: Modem and Microwave · See more »


The Minitel was a Videotex online service accessible through telephone lines, and is considered one of the world's most successful pre-World Wide Web online services.

New!!: Modem and Minitel · See more »

Mobile broadband

Mobile broadband is the marketing term for wireless Internet access through a portable modem, USB wireless modem, tablet/smartphone or other mobile device.

New!!: Modem and Mobile broadband · See more »

Mobile broadband modem

A mobile broadband modem, also known as a connect card or data card, is a type of modem that allows a personal computer or a router to receive Internet access via a mobile broadband connection instead of using telephone or cable television lines.

New!!: Modem and Mobile broadband modem · See more »

Mobile phone

A mobile phone, known as a cell phone in North America, is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area.

New!!: Modem and Mobile phone · See more »


In electronics and telecommunications, modulation is the process of varying one or more properties of a periodic waveform, called the carrier signal, with a modulating signal that typically contains information to be transmitted.

New!!: Modem and Modulation · See more »


Motorola, Inc. was an American multinational telecommunications company founded on September 25, 1928, based in Schaumburg, Illinois.

New!!: Modem and Motorola · See more »


In telecommunications and computer networks, multiplexing (sometimes contracted to muxing) is a method by which multiple analog or digital signals are combined into one signal over a shared medium.

New!!: Modem and Multiplexing · See more »

Multiprotocol Encapsulation over ATM

Multiprotocol Encapsulation over ATM is specified in RFC 2684.

New!!: Modem and Multiprotocol Encapsulation over ATM · See more »


Netgear Inc. (stylized NETGEAR) is a multinational computer networking company based in San Jose, California, with offices in about 25 other countries.

New!!: Modem and Netgear · See more »

Network address translation

Network address translation (NAT) is a method of remapping one IP address space into another by modifying network address information in the IP header of packets while they are in transit across a traffic routing device.

New!!: Modem and Network address translation · See more »

Networking hardware

Networking hardware, also known as network equipment or computer networking devices, are physical devices which are required for communication and interaction between devices on a computer network.

New!!: Modem and Networking hardware · See more »

News agency

A news agency is an organization that gathers news reports and sells them to subscribing news organizations, such as newspapers, magazines and radio and television broadcasters.

New!!: Modem and News agency · See more »

Noisy-channel coding theorem

In information theory, the noisy-channel coding theorem (sometimes Shannon's theorem or Shannon's limit), establishes that for any given degree of noise contamination of a communication channel, it is possible to communicate discrete data (digital information) nearly error-free up to a computable maximum rate through the channel.

New!!: Modem and Noisy-channel coding theorem · See more »


A notebook (notepad, writing pad, drawing pad, legal pad) is a small book or binder of paper pages, often ruled, used for purposes such as recording notes or memoranda, writing, drawing or scrapbooking.

New!!: Modem and Notebook · See more »

Novation CAT

Novation was an early modem manufacturer whose CAT series were popular in the early home computer market in the late 1970s and early 1980s, notably on the Apple II.

New!!: Modem and Novation CAT · See more »

Null modem

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

New!!: Modem and Null modem · See more »

Online service provider

An online service provider can, for example, be an Internet service provider, an email provider, a news provider (press), an entertainment provider (music, movies), a search engine, an e-commerce site, an online banking site, a health site, an official government site, social media, a wiki, or a Usenet newsgroup.

New!!: Modem and Online service provider · See more »

Opera (web browser)

Opera is a web browser for Windows, macOS, and Linux operating systems developed by Opera Software AS.

New!!: Modem and Opera (web browser) · See more »

Orthogonal frequency-division multiplexing

In telecommunications, orthogonal frequency-division multiplexing (OFDM) is a method of encoding digital data on multiple carrier frequencies.

New!!: Modem and Orthogonal frequency-division multiplexing · See more »

PC Card

In computing, PC Card is a configuration for computer parallel communication peripheral interface, designed for laptop computers.

New!!: Modem and PC Card · See more »

Pennywhistle modem

The Pennywhistle was an early acoustic coupler modem originally designed and built by Lee Felsenstein in 1973, and later commercialized and offered for sale in 1976.

New!!: Modem and Pennywhistle modem · See more »

Personal Computer Memory Card International Association

The Personal Computer Memory Card International Association (PCMCIA) was a group of computer hardware manufacturers, operating under that name from 1989 to 2009/2010.

New!!: Modem and Personal Computer Memory Card International Association · See more »

Phase-shift keying

Phase-shift keying (PSK) is a digital modulation process which conveys data by changing (modulating) the phase of a constant frequency reference signal (the carrier wave).

New!!: Modem and Phase-shift keying · See more »

Power-line communication

Power-line communication (PLC) carries data on a conductor that is also used simultaneously for AC electric power transmission or electric power distribution to consumers.

New!!: Modem and Power-line communication · See more »


Prentice is both a given name and a surname.

New!!: Modem and Prentice · See more »

Public switched telephone network

The public switched telephone network (PSTN) is the aggregate of the world's circuit-switched telephone networks that are operated by national, regional, or local telephony operators, providing infrastructure and services for public telecommunication.

New!!: Modem and Public switched telephone network · See more »

Pulse-code modulation

Pulse-code modulation (PCM) is a method used to digitally represent sampled analog signals.

New!!: Modem and Pulse-code modulation · See more »

Quadrature amplitude modulation

Quadrature amplitude modulation (QAM) is the name of a family of digital modulation methods and a related family of analog modulation methods widely used in modern telecommunications to transmit information.

New!!: Modem and Quadrature amplitude modulation · See more »


Racal Electronics plc was once the third largest British electronics firm.

New!!: Modem and Racal · See more »


Radio is the technology of using radio waves to carry information, such as sound, by systematically modulating properties of electromagnetic energy waves transmitted through space, such as their amplitude, frequency, phase, or pulse width.

New!!: Modem and Radio · See more »

Radio modem

Radio modems transfer data wirelessly across a range of up to tens of kilometres.

New!!: Modem and Radio modem · See more »


RadioShack, formally RadioShack Corporation, is the trade name of an American retailer founded in 1921, which operates a chain of electronics stores.

New!!: Modem and RadioShack · See more »

Registered jack

A registered jack (RJ) is a standardized telecommunication network interface for connecting voice and data equipment to a service provided by a local exchange carrier or long distance carrier.

New!!: Modem and Registered jack · See more »

Removable User Identity Module

Removable User Identity Module (R-UIM, usually pronounced as "R-yuim") is a card developed for cdmaOne/CDMA2000 ("CDMA") handsets that extends the GSM SIM card to CDMA phones and networks.

New!!: Modem and Removable User Identity Module · See more »

Residential gateway

In telecommunications networking, a residential gateway (more commonly known as a home router or home gateway) is a device that allows a local area network (LAN) to connect to a wide area network (WAN) via a modem.

New!!: Modem and Residential gateway · See more »

Rockwell International

Rockwell International was a major American manufacturing conglomerate in the latter half of the 20th century, involved in aircraft, the space industry, both defense-oriented and commercial electronics, automotive and truck components, printing presses, valves and meters, and industrial automation.

New!!: Modem and Rockwell International · See more »

Router (computing)

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

New!!: Modem and Router (computing) · See more »


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

New!!: Modem and RS-232 · See more »

S-100 bus

The S-100 bus or Altair bus, IEEE696-1983 (withdrawn), was an early computer bus designed in 1974 as a part of the Altair 8800.

New!!: Modem and S-100 bus · See more »

Satellite modem

A satellite modem or satmodem is a modem used to establish data transfers using a communications satellite as a relay.

New!!: Modem and Satellite modem · See more »

Satellite television

Satellite television is a service that delivers television programming to viewers by relaying it from a communications satellite orbiting the Earth directly to the viewer's location.

New!!: Modem and Satellite television · See more »

Semi-Automatic Ground Environment

The Semi-Automatic Ground Environment (SAGE, a name selected to mean "wise") was a system of large computers and associated networking equipment that coordinated data from many radar sites and processed it to produce a single unified image of the airspace over a wide area.

New!!: Modem and Semi-Automatic Ground Environment · See more »

Serial Peripheral Interface

The Serial Peripheral Interface (SPI) is a synchronous serial communication interface specification used for short distance communication, primarily in embedded systems.

New!!: Modem and Serial Peripheral Interface · See more »

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).

New!!: Modem and Serial port · See more »

Server (computing)

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

New!!: Modem and Server (computing) · See more »


A signal as referred to in communication systems, signal processing, and electrical engineering is a function that "conveys information about the behavior or attributes of some phenomenon".

New!!: Modem and Signal · See more »


In cryptography, SIGSALY (also known as the X System, Project X, Ciphony I, and the Green Hornet) was a secure speech system used in World War II for the highest-level Allied communications.

New!!: Modem and SIGSALY · See more »


Computer software, or simply software, is a generic term that refers to a collection of data or computer instructions that tell the computer how to work, in contrast to the physical hardware from which the system is built, that actually performs the work.

New!!: Modem and Software · See more »

Sphere packing

In geometry, a sphere packing is an arrangement of non-overlapping spheres within a containing space.

New!!: Modem and Sphere packing · See more »

SRI International

SRI International (SRI) is an American nonprofit research institute headquartered in Menlo Park, California.

New!!: Modem and SRI International · See more »


StarTech.com is an ISO 9001 registered technology manufacturer, specializing in hard-to-find connectivity parts, primarily used in the information technology and professional A/V industries.

New!!: Modem and StarTech.com · See more »

Subscriber identity module

A subscriber identity module or subscriber identification module (SIM), widely known as a SIM card, is an integrated circuit that is intended to securely store the international mobile subscriber identity (IMSI) number and its related key, which are used to identify and authenticate subscribers on mobile telephony devices (such as mobile phones and computers).

New!!: Modem and Subscriber identity module · See more »

Subsidy Password

The term Subsidy Password is used by Motorola and other handset manufacturers to refer to the 8-digit (or 16-digit code for newer phones such as the Motorola K1) unlock code necessary to remove the operator lock (also known as subsidy lock) from cell phones.

New!!: Modem and Subsidy Password · See more »

Supra, Inc.

Supra, Inc., previously known as Supra Corporation, were best known as manufacturers of modems for personal computers, but also produced a range of hardware for the Amiga and Atari ST, including hard drives, SCSI controllers, memory boards, and processor accelerators.

New!!: Modem and Supra, Inc. · See more »

SupraFAXModem 14400

The SupraFAXModem 14400 was a v.32bis modem.

New!!: Modem and SupraFAXModem 14400 · See more »

Symbol rate

In digital communications, symbol rate, also known as baud rate and modulation rate, is the number of symbol changes, waveform changes, or signaling events, across the transmission medium per time unit using a digitally modulated signal or a line code.

New!!: Modem and Symbol rate · See more »


A sysop (an abbreviation of system operator) is an administrator of a multi-user computer system, such as a bulletin board system (BBS) or an online service virtual community.

New!!: Modem and Sysop · See more »


Telebit was a US-based modem manufacturer, known for their TrailBlazer series of high-speed modems.

New!!: Modem and Telebit · See more »


Telegraphy (from Greek: τῆλε têle, "at a distance" and γράφειν gráphein, "to write") is the long-distance transmission of textual or symbolic (as opposed to verbal or audio) messages without the physical exchange of an object bearing the message.

New!!: Modem and Telegraphy · See more »

Telephone exchange

A telephone exchange is a telecommunications system used in the public switched telephone network or in large enterprises.

New!!: Modem and Telephone exchange · See more »

Telephone line

A telephone line or telephone circuit (or just line or circuit within the industry) is a single-user circuit on a telephone communication system.

New!!: Modem and Telephone line · See more »


Telephony is the field of technology involving the development, application, and deployment of telecommunication services for the purpose of electronic transmission of voice, fax, or data, between distant parties.

New!!: Modem and Telephony · See more »


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.

New!!: Modem and Teleprinter · See more »

Teletype Model 33

The Teletype Model 33 is an electromechanical teleprinter designed for light-duty office.

New!!: Modem and Teletype Model 33 · See more »


TP-Link (stylized as tp-link), is a Chinese manufacturer of computer networking products based in Shenzhen, Guangdong, China.

New!!: Modem and TP-Link · See more »

Trellis modulation

In telecommunication, trellis modulation (also known as trellis coded modulation, or simply TCM) is a modulation scheme that transmits information with high efficiency over band-limited channels such as telephone lines.

New!!: Modem and Trellis modulation · See more »

Twisted pair

Twisted pair cabling is a type of wiring in which two conductors of a single circuit are twisted together for the purposes of improving electromagnetic compatibility.

New!!: Modem and Twisted pair · See more »


The Universal Mobile Telecommunications System (UMTS) is a third generation mobile cellular system for networks based on the GSM standard.

New!!: Modem and UMTS · See more »

Unit of time

A unit of time or time unit is any particular time interval, used as a standard way of measuring or expressing duration.

New!!: Modem and Unit of time · See more »

Universal asynchronous receiver-transmitter

A universal asynchronous receiver-transmitter (UART) is a computer hardware device for asynchronous serial communication in which the data format and transmission speeds are configurable.

New!!: Modem and Universal asynchronous receiver-transmitter · See more »


Unix (trademarked as UNIX) is a family of multitasking, multiuser computer operating systems that derive from the original AT&T Unix, development starting in the 1970s at the Bell Labs research center by Ken Thompson, Dennis Ritchie, and others.

New!!: Modem and Unix · See more »


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.

New!!: Modem and USB · See more »


U.S. Robotics Corporation, often called USR, is a company that produces USRobotics computer modems and related products.

New!!: Modem and USRobotics · See more »


UUCP is an abbreviation of Unix-to-Unix Copy.

New!!: Modem and UUCP · See more »


V.92 is an ITU-T recommendation, titled Enhancements to Recommendation V.90, that establishes a modem standard allowing near 56 kb/s download and 48 kb/s upload rates.

New!!: Modem and V.92 · See more »

Viterbi algorithm

The Viterbi algorithm is a dynamic programming algorithm for finding the most likely sequence of hidden states—called the Viterbi path—that results in a sequence of observed events, especially in the context of Markov information sources and hidden Markov models.

New!!: Modem and Viterbi algorithm · See more »


A vocoder (a portmanteau of voice encoder) is a category of voice codec that analyzes and synthesizes the human voice signal for audio data compression, multiplexing, voice encryption, voice transformation, etc.

New!!: Modem and Vocoder · See more »

Voice modem command set

A voice modem is an analog telephone data modem with a built-in capability of transmitting and receiving voice recordings over the phone line.

New!!: Modem and Voice modem command set · See more »


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.

New!!: Modem and Wake-on-ring · See more »

Western Electric

Western Electric Company (WE, WECo) was an American electrical engineering and manufacturing company that served as the primary supplier to AT&T from 1881 to 1996.

New!!: Modem and Western Electric · See more »


Wi-Fi or WiFi is technology for radio wireless local area networking of devices based on the IEEE 802.11 standards.

New!!: Modem and Wi-Fi · See more »


Wikibooks (previously called Wikimedia Free Textbook Project and Wikimedia-Textbooks) is a wiki-based Wikimedia project hosted by the Wikimedia Foundation for the creation of free content e-book textbooks and annotated texts that anyone can edit.

New!!: Modem and Wikibooks · See more »


WiMAX (Worldwide Interoperability for Microwave Access) is a family of wireless communication standards based on the IEEE 802.16 set of standards, which provide multiple physical layer (PHY) and Media Access Control (MAC) options.

New!!: Modem and WiMAX · See more »

Yamar Electronics

Yamar specializes in semiconductor smart transceivers for communication over noisy AC and DC battery power lines.

New!!: Modem and Yamar Electronics · See more »

Zoom Telephonics

Zoom Telephonics, Inc. designs, produces, and markets, and supports cable modems and other communications products with emphasis on Internet access products and Wi-Fi products.

New!!: Modem and Zoom Telephonics · See more »


Zyxel Communications Corp.

New!!: Modem and Zyxel · See more »


3Com Corporation was a digital electronics manufacturer best known for its computer network products.

New!!: Modem and 3Com · See more »

56 kbit/s line

A 56 kbit/s line is a digital connection capable of carrying 56 kilobits per second (kbit/s), or 56,000 bit/s, the data rate of a classical single channel digital telephone line in North America.

New!!: Modem and 56 kbit/s line · See more »

Redirects here:

3G dongle, 56 Kbps modem, 56 kbit/s modem, 56,000 bps modem, 56K, 56K modem, 56k, 56k Modem, 56k modem, 56kbit modem, Analog modem, Computer modem, Dial-up modem, External modem, Gsm modem, Intelligent modem, K56Flex, K56Plus, K56flex, K56plus, Limited Distance Modem, MODEM, Mdoem, Mobile USB modem, Modems, Phone Modem, Portable modem, Telephone modem, Usb modem, V.Flex2, Voiceband modem, X2 (Chipset), X2 (protocol), 🖀.


[1] https://en.wikipedia.org/wiki/Modem

Hey! We are on Facebook now! »