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

X.25

Index X.25

X.25 is an ITU-T standard protocol suite for packet switched wide area network (WAN) communication. [1]

67 relations: Amateur radio, Area control center, AUSTPAC, Automated teller machine, AX.25, Basic Rate Interface, Bell Canada, Brooklyn College, Circuit switching, CompuServe, Computer terminal, Connection-Oriented Network Service, Data circuit-terminating equipment, Data link layer, Data terminal equipment, DATAPAC, E.164, Error detection and correction, Financial transaction, Frame Relay, Iberpac, IBM Systems Network Architecture, IEEE 802.2, Integrated Services Digital Network, Internet Protocol, Internet protocol suite, ITU-T, LAPB, Leased line, Local area network, Medium access control, Minitel, Network layer, NSAP address, Online service provider, Open Systems Interconnection, OSI model, Packet Assembler/Disassembler, Packet Layer Protocol, Packet radio, Packet Switch Stream, Packet switching, Physical layer, Plain old telephone service, Point of sale, Point-to-point (telecommunications), Public data network, Public switched telephone network, Racal, Sliding window protocol, ..., Telenet, Telephone company, Telex, Tymnet, Videotex, Virtual call capability, Virtual circuit, Wide area network, X.121, X.21, X.28, X.29, X.3, X.400, X.75, X.PC, XOT. Expand index (17 more) »

Amateur radio

Amateur radio, also known as ham radio, describes the use of radio frequency spectrum for purposes of non-commercial exchange of messages, wireless experimentation, self-training, private recreation, radiosport, contesting, and emergency communication.

New!!: X.25 and Amateur radio · See more »

Area control center

In air traffic control, an area control center (ACC), also known as a center (or in some cases, en-route, as opposed to TRACON control), is a facility responsible for controlling aircraft en route in a particular volume of airspace (a Flight Information Region) at high altitudes between airport approaches and departures.

New!!: X.25 and Area control center · See more »

AUSTPAC

AUSTPAC was a public X.25 network operated by Telstra.

New!!: X.25 and AUSTPAC · See more »

Automated teller machine

An automated teller machine (ATM) is an electronic telecommunications device that enables customers of financial institutions to perform financial transactions, such as cash withdrawals, deposits, transfer funds, or obtaining account information, at any time and without the need for direct interaction with bank staff.

New!!: X.25 and Automated teller machine · See more »

AX.25

AX.25 (Amateur X.25) is a data link layer protocol derived from the X.25 protocol suite and designed for use by amateur radio operators.

New!!: X.25 and AX.25 · See more »

Basic Rate Interface

Basic Rate Interface (BRI, 2B+D, 2B1D) or Basic Rate Access is an Integrated Services Digital Network (ISDN) configuration intended primarily for use in subscriber lines similar to those that have long been used for voice-grade telephone service.

New!!: X.25 and Basic Rate Interface · See more »

Bell Canada

Bell Canada (commonly referred to as Bell) is a Canadian telecommunications company headquartered in Montreal, Quebec, Canada.

New!!: X.25 and Bell Canada · See more »

Brooklyn College

Brooklyn College is a senior university of the City University of New York, located on the border of the Midwood and Flatbush neighborhoods of Brooklyn, New York City.

New!!: X.25 and Brooklyn College · See more »

Circuit switching

Circuit switching is a method of implementing a telecommunications network in which two network nodes establish a dedicated communications channel (circuit) through the network before the nodes may communicate.

New!!: X.25 and Circuit switching · See more »

CompuServe

CompuServe (CompuServe Information Service, also known by its initialism CIS) was the first major commercial online service provider in the United States.

New!!: X.25 and CompuServe · See more »

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.

New!!: X.25 and Computer terminal · See more »

Connection-Oriented Network Service

Connection-Oriented Network Service (CONS) is one of the two OSI network layer protocols, the other being CLNS (Connectionless Network Service).

New!!: X.25 and Connection-Oriented Network Service · See more »

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.

New!!: X.25 and Data circuit-terminating equipment · See more »

Data link layer

The data link layer, or layer 2, is the second layer of the seven-layer OSI model of computer networking.

New!!: X.25 and Data link layer · See more »

Data terminal equipment

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

New!!: X.25 and Data terminal equipment · See more »

DATAPAC

DATAPAC was Canada's packet switched X.25-equivalent data network.

New!!: X.25 and DATAPAC · See more »

E.164

E.164 is an ITU-T recommendation, titled The international public telecommunication numbering plan, that defines a numbering plan for the worldwide public switched telephone network (PSTN) and some other data networks.

New!!: X.25 and E.164 · See more »

Error detection and correction

In information theory and coding theory with applications in computer science and telecommunication, error detection and correction or error control are techniques that enable reliable delivery of digital data over unreliable communication channels.

New!!: X.25 and Error detection and correction · See more »

Financial transaction

A financial transaction is an agreement, or communication, carried out between a buyer and a seller to exchange an asset for payment.

New!!: X.25 and Financial transaction · See more »

Frame Relay

Frame Relay is a standardized wide area network technology that specifies the physical and data link layers of digital telecommunications channels using a packet switching methodology.

New!!: X.25 and Frame Relay · See more »

Iberpac

Iberpac (or Red UNO) is the Spanish packet switched X.25 data network.

New!!: X.25 and Iberpac · See more »

IBM Systems Network Architecture

Systems Network Architecture (SNA) is IBM's proprietary networking architecture, created in 1974.

New!!: X.25 and IBM Systems Network Architecture · See more »

IEEE 802.2

IEEE 802.2 is the original name of the ISO/IEC 8802-2 standard which defines logical link control (LLC) as the upper portion of the data link layer of the OSI Model.

New!!: X.25 and IEEE 802.2 · See more »

Integrated Services Digital Network

Integrated Services Digital Network (ISDN) is a set of communication standards for simultaneous digital transmission of voice, video, data, and other network services over the traditional circuits of the public switched telephone network.

New!!: X.25 and Integrated Services Digital Network · See more »

Internet Protocol

The Internet Protocol (IP) is the principal communications protocol in the Internet protocol suite for relaying datagrams across network boundaries.

New!!: X.25 and Internet Protocol · See more »

Internet protocol suite

The Internet protocol suite is the conceptual model and set of communications protocols used on the Internet and similar computer networks.

New!!: X.25 and Internet protocol suite · See more »

ITU-T

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!!: X.25 and ITU-T · See more »

LAPB

Link Access Procedure, Balanced (LAPB) implements the data link layer as defined in the X.25 protocol suite.

New!!: X.25 and LAPB · See more »

Leased line

A leased line is a private bidirectional or symmetric telecommunications circuit between two or more locations provided in exchange for a monthly rent.

New!!: X.25 and Leased line · 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!!: X.25 and Local area network · See more »

Medium access control

In IEEE 802 LAN/MAN standards, the medium access control (MAC) sublayer (also known as the media access control sublayer) and the logical link control (LLC) sublayer together make up the data link layer.

New!!: X.25 and Medium access control · See more »

Minitel

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!!: X.25 and Minitel · See more »

Network layer

In the seven-layer OSI model of computer networking, the network layer is layer 3.

New!!: X.25 and Network layer · See more »

NSAP address

A Network Service Access Point address (NSAP address), defined in ISO/IEC 8348, is an identifying label for a Service Access Point (SAP) used in OSI networking.

New!!: X.25 and NSAP address · 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!!: X.25 and Online service provider · See more »

Open Systems Interconnection

The Open Systems Interconnection model (OSI model) is a conceptual model that characterizes and standardizes the communication functions of a telecommunication or computing system without regard to its underlying internal structure and technology.

New!!: X.25 and Open Systems Interconnection · See more »

OSI model

The Open Systems Interconnection model (OSI model) is a conceptual model that characterizes and standardizes the communication functions of a telecommunication or computing system without regard to its underlying internal structure and technology.

New!!: X.25 and OSI model · See more »

Packet Assembler/Disassembler

A packet assembler/disassembler, abbreviated PAD is a communications device which provides multiple asynchronous terminal connectivity to an X.25 (packet-switching) network or host computer.

New!!: X.25 and Packet Assembler/Disassembler · See more »

Packet Layer Protocol

Packet Layer Protocol or PLP is the Network Layer protocol for the X.25 protocol suite.

New!!: X.25 and Packet Layer Protocol · See more »

Packet radio

Packet radio is a form of packet switching technology used to transmit digital data via wireless communications.

New!!: X.25 and Packet radio · See more »

Packet Switch Stream

In the United Kingdom, Packet Switch Stream (PSS) was an X.25-based packet-switched network, provided by the British Post Office Telecommunications and then British Telecommunications starting in 1980.

New!!: X.25 and Packet Switch Stream · See more »

Packet switching

Packet switching is a method of grouping data which is transmitted over a digital network into packets which are made of a header and a payload.

New!!: X.25 and Packet switching · See more »

Physical layer

In the seven-layer OSI model of computer networking, the physical layer or layer 1 is the first and lowest layer.

New!!: X.25 and Physical layer · See more »

Plain old telephone service

Plain old telephone service or plain ordinary telephone service (POTS) is a retronym for voice-grade telephone service employing analog signal transmission over copper loops.

New!!: X.25 and Plain old telephone service · See more »

Point of sale

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

New!!: X.25 and Point of sale · See more »

Point-to-point (telecommunications)

In telecommunications, a point-to-point connection refers to a communications connection between two Communication endpoints or nodes.

New!!: X.25 and Point-to-point (telecommunications) · See more »

Public data network

A public data network is a network established and operated by a telecommunications administration, or a recognized private operating agency, for the specific purpose of providing data transmission services for the public.

New!!: X.25 and Public data network · 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!!: X.25 and Public switched telephone network · See more »

Racal

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

New!!: X.25 and Racal · See more »

Sliding window protocol

A sliding window protocol is a feature of packet-based data transmission protocols.

New!!: X.25 and Sliding window protocol · See more »

Telenet

Telenet was an American commercial packet switched network which went into service in 1974.

New!!: X.25 and Telenet · See more »

Telephone company

A telephone company, also known as a telco, telephone service provider, or telecommunications operator, is a kind of communications service provider (CSP) (more precisely a telecommunications service provider or TSP) that provides telecommunications services such as telephony and data communications access.

New!!: X.25 and Telephone company · See more »

Telex

The telex network was a public switched network of teleprinters similar to a telephone network, for the purposes of sending text-based messages.

New!!: X.25 and Telex · See more »

Tymnet

Tymnet was an international data communications network headquartered in Cupertino, California that used virtual call packet switched technology and X.25, SNA/SDLC, ASCII and BSC interfaces to connect host computers (servers) at thousands of large companies, educational institutions, and government agencies.

New!!: X.25 and Tymnet · See more »

Videotex

Videotex (or "interactive videotex") was one of the earliest implementations of an end-user information system.

New!!: X.25 and Videotex · See more »

Virtual call capability

In telecommunication, a virtual call capability, sometimes called a virtual call facility, is a service feature in which.

New!!: X.25 and Virtual call capability · See more »

Virtual circuit

A virtual circuit (VC) is a means of transporting data over a packet switched computer network in such a way that it appears as though there is a dedicated physical layer link between the source and destination end systems of this data.

New!!: X.25 and Virtual circuit · See more »

Wide area network

A wide area network (WAN) is a telecommunications network or computer network that extends over a large geographical distance/place.

New!!: X.25 and Wide area network · See more »

X.121

X.121 is the ITU-T address format of the X.25 protocol suite used as part of call setup to establish a switched virtual circuit between Public Data Networks (PDNs), connecting two network user addresses (NUAs).

New!!: X.25 and X.121 · See more »

X.21

X.21 (sometimes referred to as X21) is an interface specification for differential communications introduced in the mid-1970s by the ITU-T. X.21 was first introduced as a means to provide a digital signaling interface for telecommunications between carriers and customers' equipment.

New!!: X.25 and X.21 · See more »

X.28

X.28 is an ITU-T standard specifying the interface between asynchronous character-mode data terminal equipment (DTE), such as computer terminals, and a Packet Assembler/Disassembler (PAD) that connects the DTE to a packet switched network such as an X.25 network.

New!!: X.25 and X.28 · See more »

X.29

X.29 is the ITU-T standard, approved by ISO, specifying procedures for the exchange of control information and user data between a Packet Assembler/Disassembler (PAD), and a remote packet-mode data terminal equipment (DTE) or another PAD.

New!!: X.25 and X.29 · See more »

X.3

X.3 is an ITU-T standard indicating what functions are to be performed by a Packet Assembler/Disassembler (PAD) when connecting character-mode data terminal equipment (DTE), such as a computer terminal, to a packet switched network such as an X.25 network, and specifying the parameters that control this operation.

New!!: X.25 and X.3 · See more »

X.400

X.400 is a suite of ITU-T Recommendations that define standards for Data Communication Networks for Message Handling Systems (MHS) — more commonly known as email.

New!!: X.25 and X.400 · See more »

X.75

X.75 is an International Telecommunication Union (ITU) (formerly CCITT) standard specifying the interface for interconnecting two X.25 networks.

New!!: X.25 and X.75 · See more »

X.PC

X.PC is a deprecated communications protocol developed by McDonnell-Douglas for connecting a personal computer to its Tymnet packet-switched public data telecommunications network.

New!!: X.25 and X.PC · See more »

XOT

XOT (X.25 Over TCP) is a protocol developed by Cisco Systems that enables X.25 packets to be encapsulated and routed through TCP/IP connections instead of LAPB links.

New!!: X.25 and XOT · See more »

Redirects here:

X.25 protocol suite.

References

[1] https://en.wikipedia.org/wiki/X.25

OutgoingIncoming
Hey! We are on Facebook now! »