- 産業: Telecommunications
- Number of terms: 29235
- Number of blossaries: 0
- Company Profile:
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.
1. The complete set of signals, usually electromagnetic or acoustic, received from a source such as an infrared object, a radio or radar transmitter, an aircraft, or a ship. Note: Signatures may consist of analog or digital signals, or both, and may be analyzed to indicate the nature of their source and assist in its recognition. 2. The attributes of an electromagnetic or acoustic wave that has been reflected from or transmitted through an object and contains information indicating the attributes of the object. Note: In this context, "objects" may include man-made objects or natural ones, the latter including both those that are well defined, e.g., terrain, and those that are not, e.g., weather phenomena. See also digital signature.
Industry:Telecommunications
1. The communications facilities between adjacent nodes of a network. Synonym telecommunications link. 2. A portion of a circuit connected in tandem with, i.e., in series with, other portions. 3. A radio path between two points, called a radio link. 4. In communications, a general term used to indicate the existence of communications facilities between two points. 5. A conceptual circuit, i.e., logical circuit, between two users of a network, that enables the users to communicate, even when different physical paths are used. Note 1: In all cases, the type of link, such as data link, downlink, duplex link, fiber optic link, line-of-sight link, point-to-point link, radio link and satellite link, should be identified. Note 2: A link may be simplex, half-duplex, or duplex. 6. In a computer program, a part, such as a single instruction or address, that passes control and parameters between separate portions of the program. 7. In hypertext, a logical connection between discrete units of data, or a hypertext connection between Web pages. Synonyms (in this sense) hotlink, hyperlink.
Industry:Telecommunications
1. The combination of a hierarchical security classification and a set of security categories that represents the sensitivity of an object or the security clearance of a subject. 2. The combination of hierarchical classification and a set of non- hierarchical categories that represent the sensitivity of information.
Industry:Telecommunications
1. The capability, in security systems, that guarantees that a message or data can be proven to have originated from a specific person. 2. Assurance the sender of data is provided with proof of delivery and the recipient is provided with proof of the sender's identity, so neither can later deny having processed the data. 3. The property of a receiver being able to prove that the sender of some data did in fact send the data even though the sender might later deny ever having sent it.
Industry:Telecommunications
1. The Bell-La Padula security model rule allowing a subject write access to an object only if the security level of the object dominates the security level of the subject. 2. A Bell-LaPadula security model rule allowing a subject write access to an object only if the security level of the subject is dominated by the security level of the object. Also known as the Confinement Property.
Industry:Telecommunications
1. The basis for coordinated dissemination of time signals, counted from 0000 at midnight. 2. In celestial navigation applications, the time which gives the exact rotational orientation of the Earth obtained from UTC by applying increments determined by the U. S. Naval Observatory. 3. A measure of time that conforms, within a close approximation, to the mean diurnal rotation of the Earth and serves as the basis of civil timekeeping. Note: Universal Time (UT1) is determined from observations of the stars, radio sources, and also from ranging observations of the Moon and artificial Earth satellites. The scale determined directly from such observations is designated Universal Time Observed (UTO); it is slightly dependent on the place of observation. When UTO is corrected for the shift in longitude of the observing station caused by polar motion, the time scale UT1 is obtained. When an accuracy better than one second is not required, Universal Time can be used to mean Coordinated Universal Time (UTC. ) Synonym Zulu Time. 4. The official civil time of the United Kingdom. Formerly called Greenwich Mean Time.
Industry:Telecommunications
1. The art or science concerning the principles, means, and methods for rendering plain information unintelligible, and for restoring encrypted information to intelligible form. 2. The branch of cryptology that treats of the principles, means, and methods of designing and using cryptosystems. 3. The discipline which embodies principles, means, and the methods for the transformation of data in order to hide its information content, prevent its undetected modification and/or prevent its unauthorized use. Note: Cryptography determines the methods used in encipherment and decipherment. An attack on a cryptographic principle, means, or methods is cryptanalysis.
Industry:Telecommunications
1. The amount of undesired signal power required at the input terminals of a receiver to cause barely perceptible interference at the receiver output terminals. 2. In cryptology, the level above which a system has the ability to continue to process critical applications in spite of the fact that it has suffered disruptive or damaging effects (such as contamination with dust, an earthquake, a bomb, etc. )
Industry:Telecommunications
1. The alternating current (ac) component of the alerting signal. 2. An ac signal applied across the network interface (NI) of such magnitude, frequency, and duration to cause an electromechanical ringer to ring. Used to alert the customer installation (CI) of an incoming call.
Industry:Telecommunications
1. The aggregate of participants in the use of a portion of cyberspace. 2. A special-interest group (SIG) of cyberspace participants. Synonym wired community.
Industry:Telecommunications
