- Industry: 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.
In traditional telephony, a nominal period (usually approximately 6 seconds) composed of alternate (a) ringing signals (ringing current) and (b) a silent interval.
Industry:Telecommunications
In transmission security, see secure communications. 2. In spread-spectrum systems, the transmission of binary coded sequences that represent information that can be recovered only by persons or systems that have the proper key for the spread-spectrum code-sequence generator, i.e., have a synchronized generator that is identical to that used for transmission.
Industry:Telecommunications
In transmission systems, a control character (a) that is used to accomplish media-fill stuffing or a time-fill stuffing in storage device or in a data transmission line and (b) that may be inserted and removed from a series of characters without affecting the meaning of the series. Note: The null character may affect the control of equipment or the format of messages.
Industry:Telecommunications
In transmission systems, any scheme used to provide such functions as system control, addressing, routing, error detection and correction, level control, priority, traffic control, message accountability, and/or other required overhead information.
Industry:Telecommunications
In transmission systems, the aggregate of crosstalk induced in a given line by all other lines.
Industry:Telecommunications
In tropospheric radio propagation, the ratio of the effective Earth radius to the actual Earth radius. Note: The k-factor is approximately 4/3. 2. In ionospheric radio propagation, a correction factor that (a) is applied in calculations related to curved layers, and (b) is a function of distance and the real height of ionospheric reflection.
Industry:Telecommunications
In TV and facsimile, pertaining to the signal level that corresponds to the brightest part, i.e., the spot with the highest luminance or reflectivity, of the object being scanned.
Industry:Telecommunications
In TV and facsimile, pertaining to the signal or signal level that corresponds to the darkest part, i.e., the spot with the lowest luminance or reflectivity, of the object being scanned.
Industry:Telecommunications
In universal personal telecommunications (UPT,) (a) the ability of a user to access telecommunication services at any UPT terminal on the basis of a personal identifier, and (b) the capability of the network to provide those services in accord with the user's service profile. Note 1: The personal mobility aspects of personal communications are based on the UPT number. Note 2: Personal mobility involves the network's capability to locate the terminal associated with the user for the purposes of addressing, routing, and charging the user for calls. Note 3: "Access" is intended to convey the concepts of both originating and terminating services. Note 4: Management of the service profile by the user is not part of personal mobility.
Industry:Telecommunications
In universal personal telecommunications service, a person who (or entity that) has access to universal personal telecommunications (UPT) services and who has been assigned a UPT number.
Industry:Telecommunications
