A DTE-DCE interface specification based on LAPD (Q.921), the Integrated Services Digital Network version of LAPB (X.25 data link layer). A common specification was produced by a consortium of StrataCom, Cisco, Digital, and Northern Telecom.
Frame Relay is the result of wide area networking requirements for speed; LAN-WAN and LAN-LAN internetworking; “bursty” data communications; multiplicity of protocols and protocol transparency. These requirements can be met with technology such as optical fibre lines, allowing higher speeds and fewer transmission errors; intelligent network end devices (personal computers, workstations, and servers); standardisation and adoption of ISDN protocols. Frame Relay could connect dedicated lines and X.25 to ATM, SMDS, BISDN and other “fast packet” technologies.
Frame Relay uses the same basic data link layer framing and Frame Check Sequence so current X.25 hardware still works. It adds addressing (a 10-bit Data Link Connection Identifier (DLCI)) and a few control bits but does not include retransmissions, link establishment, windows or error recovery. It has none of X.25’s session layer but adds some simple interface management. Any network layer protocol can be used over the data link layer Frames.
Frame Relay Resource Center (http://alliancedatacom.com/framerelay.asp).
[freym] /freɪm/ noun 1. a border or case for enclosing a picture, mirror, etc. 2. a rigid structure formed of relatively slender pieces, joined so as to surround sizable empty spaces or nonstructural panels, and generally used as a major support in building or engineering works, machinery, furniture, etc. 3. a body, especially a human […]
- Frame saw
noun 1. a saw with a thin blade held in a specially shaped frame Also called span saw
[freym-shift] /ˈfreɪmˌʃɪft/ noun, Genetics. 1. the addition or deletion of one or more nucleotides in a strand of DNA, which the codon triplets of the genetic code of messenger RNA and causes a misreading during translation, resulting in an aberrant protein and therefore a mutation. frameshift (frām’shĭft’) Relating to a mutation that occurs when one […]
noun, Genetics. 1. a mutation caused by frameshift.