- Cell relay
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-orientedpacket switched data communications protocol.
transmission rates usually are between 56 kbit/sand 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-3and faster).
Cell relay protocols have neither
flow controlnor error correctioncapability, are information-content independent, and correspond only to layers one and two of the OSI Reference Model.
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.
Cell relay is an implementation of fast packet-switching technology that is used in connection-oriented broadband integrated services digital networks (
B-ISDN, and its better-known supporting technology ATM) and connectionless IEEE 802.6switched multi-megabit data service ( SMDS).
Cell relay is used for time-sensitive traffic such as voice and video.
Federal Standard 1037C
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