- Industry: 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.
In a communications system in which one or more electromagnetic sources are used, electromagnetic radiation--such as lightwaves, radio waves, microwaves, X-rays, or gamma rays from one or more of the sources--that is not harmonically related, i.e., is not coherent, with the transmitted carrier. Note: Parasitic emissions are usually caused by undesired oscillations or energy-level transitions in the sources.
Industry:Telecommunications
In a communications system, a diagram that (a) shows all links between all switchboards, exchanges, switching centers, and stations in the system, such as the links between primary relay, major relay, minor relay, and tributary stations as well as supplementary links, (b) is used to identify the stations and links, and (c) is used to indicate tape-relay routes, transfer circuits, refile circuits, radio links, operational status, line conditions, and other network information required for network operations and management.
Industry:Telecommunications
In a communications system, a momentary loss of signal. Note: Dropouts are usually caused by noise, propagation anomalies, or system malfunctions. 2. A failure to read properly a binary character from data storage. Note: A dropout is usually caused by a defect in the storage medium or by a malfunction of the read mechanism. 3. In magnetic tape, disk, card, or drum systems, a recorded signal with an amplitude less than a predetermined percentage of a reference signal.
Industry:Telecommunications
In a communications system, a signal sent in the backward direction to indicate that a call will not be completed because of a call-originator or a call-receiver facility requirement. Note: An access barred signal may occur for many reasons, such as the failure of a closed user group validation check on an incoming calls-barred facility.
Industry:Telecommunications
In a communications system, a signal that indicates that the system is ready to receive a selection signal. Note: An example of a proceed-to-select signal is a dial tone.
Industry:Telecommunications
In a communications system, a specified set of functions provided to designated users. Note: Dedicated service is usually specified in a communications format, such as voice, digital data, facsimile, or video.
Industry:Telecommunications
In a communications system, a technique for allocating use of bandwidth among multiple users, based on demand. Note: DAMA can be implemented in many ways including TDM and FDM.
Industry:Telecommunications
In a communications system, an unsuccessful access that results in termination of an access attempt in any manner other than initiation of user information transfer between the intended source and destination (sink) within the specified maximum access time. Note: Access failure can be the result of access denial, access outage, user blocking, or incorrect access.
Industry:Telecommunications
In a communications system, operation in which (a) internal security controls prevent inadvertent disclosures, (b) personnel, physical, and administrative controls are used to prevent unauthorized access, (c) both cleared and uncleared users are serviced, and (d) if required, both secured and unsecured remote terminal areas are serviced.
Industry:Telecommunications
In a communications system, the collection of hardware, software, firmware, or any combination of these, that is required or used to convert the protocols used in one network to those used in another network.
Industry:Telecommunications
