- 行业: 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 probability of a call's being blocked or delayed more than a specified interval, expressed as a decimal fraction. Note: Grade of service may be applied to the busy hour or to some other specified period or set of traffic conditions. Grade of service may be viewed independently from the perspective of incoming versus outgoing calls, and is not necessarily equal in each direction. 2. In telephony, the quality of service for which a circuit is designed or conditioned to provide, e.g., voice grade or program grade. Note: Criteria for different grades of service may include equalization for amplitude over a specified band of frequencies, or in the case of digital data transported via analog circuits, equalization for phase also.
Industry:Telecommunications
1. The principle requiring that each subject be granted the most restrictive set of privileges needed for the performance of authorized tasks. Application of this principle limits the damage that can result from accident, error, or unauthorized use of an information system (IS. ) 2. The principle of granting only such access rights as are required for subjects to perform their authorized tasks. Note: Extension of the principle of need-to-know covering all access rights, not just "read access". See also: Role. 3. This principle requires that each subject in a system be granted the most restrictive set of privileges (or lowest clearance) needed for the performance of authorized tasks. The application of this principle limits the damage that can result from accident, error, or unauthorized use.
Industry:Telecommunications
1. The primary switch used to apply and remove power from equipment. 2. A circuit breaker used on ac circuits rated in excess of 1500V.
Industry:Telecommunications
1. The prevention of authorized access to resources or the delaying of time-critical operations. 2. The result of any action or series of actions that prevents any part of an information system (IS) from functioning. 3. 1. The unauthorized withholding of information or resources. 4. The prevention of legitimate access. Note: This may result from either accidental or malicious causes. 5. The prevention of authorized access to resources or the delaying of time-critical operations. 6. The unauthorized prevention of authorized access to resources or the delaying of time-critical operations. 7. A denial of service attack is when an attacker consumes the resources on your computer for things it was not intended to be doing, thus preventing normal use of your network resources for legitimate purposes.
Industry:Telecommunications
1. The pretense by an entity to be a different entity in order to gain unauthorized access. 2. The pretence by an entity to be a different entity.
Industry:Telecommunications
1. The practice of routing telecommunications traffic beyond its intended destination, and then back to the intended destination, usually for the purpose of taking advantage of tariffs or prices that are lower than those afforded by direct routing. 2. In security, to bring a call that has been routed along a particular path (usually via satellite) to some earlier position in the switching sequence (also using satellites. ) Note: The technique supports CALEA, the Communications Assistance to Law Enforcement Act and LAES, Lawfully Authorized Electronic Surveillance. 3. In commercial telephone networks, referring to a trunk or line between two central offices that may not share the same facilities or geographic location, and which trunk is used to support special services, e.g., orderwires, off-premises extensions, common exchange number routing, or least-cost routing of customer centrex services. 4. In mission programs requiring contingency networking, referring to a link that provides feedback to the mission control center to verify that the transmission via a primary communications has been successful. Note: In cases where the primary path fails to deliver the transmission, the communications may occur over the backhaul connection or an alternative network connection. 5. In contingency networking, an alternative connection that is routed via a diversified path, e.g., an alternative frequency, satellite facility, cable, trunk, or time slot.
Industry:Telecommunications
1. The possibility that a particular threat will exploit a particular vulnerability of a data processing system. 2. The likelihood that a successful attack will be mounted against a computer system. Risk is a function of both vulnerability and threat.
Industry:Telecommunications
1. The portion of a computer that includes circuits controlling the interpretation and execution of instructions. 2. The portion of a computer that executes programmed instructions, performs arithmetic and logical operations on data, and controls input/output functions. Synonym central processor. 3. Abbreviation for communications processor unit. A computer embedded in a communications system, i.e., the portion of a digital communications switch that executes programmed instructions, performs arithmetic and logical operations on signals, and controls input/output functions.
Industry:Telecommunications
1. The portion of a communications link used for the transmission of signals from an Earth terminal to a satellite or to an airborne platform. Note: An uplink is the converse of a downlink. 2. Pertaining to data transmission from a data station to the headend.
Industry:Telecommunications
1. The physical medium on which information is stored in recoverable form. 2. In facsimile transmission, the physical medium on which the recorder forms an image of the object, i.e., creates the recorded copy. Note: The record medium and the record sheet may be identical. Synonym record sheet.
Industry:Telecommunications
