- 行业: Telecommunications
- Number of terms: 29235
- Number of blossaries: 0
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ATIS is the leading technical planning and standards development organization committed to the rapid development of global, market-driven standards for the information, entertainment and communications industry.
A data communications system that uses asynchronous operation. Note: The time spacing between successive data characters or blocks may be of arbitrary duration. Synonym start-stop system.
Industry:Telecommunications
A data communications system that uses asynchronous operation. Note: The time spacing between successive data characters or blocks may be of arbitrary duration. Synonym start-stop system.
Industry:Telecommunications
A data compression technique that requires more processing capability to compress than to decompress. Note: Asymmetric compression is typically used for the mass distribution of programs on media such as CD ROM, where significant expense can be incurred for the production and compression of data but the retrieval (or the playback) system must be low in cost.
Industry:Telecommunications
A data encryption standard developed by IBM under the auspices of the United States Government and adopted as a Federal Standard in 1977. DES uses a 56 bit key to perform a series of nonlinear transformation on a 64 bit data block. Even when it was first introduced a number of years ago, it was criticized for not having a long enough key. 56 bits just didn't put it far enough out of reach of a brute force attack. Today, with the increasing speed of hardware and its falling cost, it would be feasible to build a machine that could crack a 56 bit key in under a day's time. It is not known if such a machine has really been built, but the fact that it is feasible tends to weaken the security of DES substantially. The DES has been rescinded as a Federal Standard. Abbreviation for Data Encryption Standard.
Industry:Telecommunications
A data network in which synchronism is achieved and maintained between data circuit-terminating equipment (DCE) and the data switching exchange (DSE,) and between DSEs. Note: The data signaling rates are controlled by timing equipment within the network.
Industry:Telecommunications
A data structure, beginning and ending with delimiters, that consists of fields predetermined by a protocol for the transmission of user data and control data.
Industry:Telecommunications
A data transmission channel in which separate timing information is not transferred between the data terminal equipment (DTE) and the data circuit terminating equipment (DCE. )
Industry:Telecommunications
A data transmission service requiring the establishment of a circuit-switched connection before data can be transferred from source data terminal equipment (DTE) to a sink DTE. Note: A circuit-switched data transmission service uses a connection-oriented network.
Industry:Telecommunications
A data transmission service that is established and operated by a telecommunication administration, or a recognized private operating agency, and uses a public data network. Note: A public data transmission service may include circuit-switched, packet-switched, and leased-circuit data transmission.
Industry:Telecommunications
