In telecommunications, cell relay refers to a method of statistically multiplexing fixed-length packets, i.e. cells, to transport data between computers or kinds of network equipment. It is an unreliable, connection-oriented packet switched data communications protocol. BlackBerry 7100t Telecommunication is the extension of communication over a distance. ... Multiplex is either a word derived from multi- + plex (fold) or a synthetic portmanteau combining the words multiple and complex and can be another word for many or (literally) manifold. ... A packet is the fundamental unit of information carriage in all modern computer networks. ... Wikipedia does not yet have an article with this exact name. ... In computer networking, a connection-oriented protocol is one that ensures data arrival via some internal method, as opposed to a connectionless protocol, which does not guarantee than all the data will arrive (or indeed, any). ... In computer networking and telecommunications, packet switching is a communications paradigm in which packets (messages or fragments of messages) are individually routed between nodes, with no previously established communication path. ...

Note 1: Cell relay transmission rates usually are between 56 kbit/s and several gigabits per second. ATM, a particularly popular form of cell relay, is most commonly used for home DSL connections, which often runs between 128 kbit/s and 1.544 Mbit/s (DS1), and for high-speed backbone connections (OC-3 and faster). Digital signal 1 (DS1, also known as a T1) is a T-carrier signaling scheme devised by Bell Labs. ... OC-3 (Optical Carrier 3) is a network line with transmission speed of 155. ...

Note 2: Cell relay protocols (a) have neither flow control nor error correction capability, (b) are information-content independent, and (c) correspond only to layers one and two of the ISO Open Systems Interconnection--Reference Model. Transmit flow control: In data communications systems, control of the rate at which data are transmitted from a terminal so that the data can be received by another terminal. ... In computer science and information theory, error correction consists of using methods to detect and/or correct errors in the transmission or storage of data by the use of some amount of redundant data and (in the case of transmission) the selective retransmission of incorrect segments of the data. ... ISO has many meanings: Iso is the stem of the Latin transliteration of the Greek word ίσος (ísos, meaning equal). The iso- prefix in English derives from this and means equality or similarity. ... The Open Systems Interconnection Reference Model (OSI Model or OSI Reference Model for short) is a layered abstract description for communications and computer network protocol design, developed as part of the Open Systems Interconnect initiative. ...

Note 3: Cell relay systems enclose variable-length user packets in fixed-length packets, i.e. cells, that add addressing and verification information. Frame length is fixed in hardware, based on time delay and user packet-length considerations. One user data message may be segmented over many cells. In telecommunications, a frame is a packet which has been encoded for transmission over a particular link. ... Hardware is equipment such as fasteners, keys, locks, hinges, latches, corners, handles, wire, chains, plumbing supplies, tools, utensils, cutlery and machine parts, especially when they are made of metal. ...

Note 4: Cell relay is an implementation of fast packet technology that is used in (a) connection-oriented broadband integrated services digital networks (B-ISDN, and its better-known supporting technology ATM) and (b) connectionless IEEE 802.6, switched multi-megabit data service (SMDS). In the 1970s the telecommunications industry conceived that digital services would follow much the same pattern as voice services, and conceived a grandiose vision of end_to_end circuit switched services, known as the Broadband Integrated Services Digital Network (B-ISDN). ... For other uses of ATM, see ATM. Asynchronous Transfer Mode, or ATM for short, is a cell relay network protocol which encodes data traffic into small fixed sized (53 byte; 48 bytes of data and 5 bytes of header information) cells instead of variable sized packets as in packet-switched... IEEE 802. ... SMDS, which stands for Switched Multi-megabit Data Services, was a connectionless service used to connect LANs, MANs and WANs to exchange data. ...

Note 5: Cell relay is used for time-sensitive traffic such as voice and video.

Source: from Federal Standard 1037C Federal Standard 1037C entitled Telecommunications: Glossary of Telecommunication Terms is a U.S. Federal Standard, issued by the General Services Administration pursuant to the Federal Property and Administrative Services Act of 1949, as amended. ...