ATIS Telecom Glossary
Wednesday, March 29, 2017

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1. In data transmission, the sequence of contiguous bits delimited by, and including, beginning and ending flag sequences. Note 1: A frame usually consists of a specified number of bits between flag sequences and usually includes an address field, a control field, and a frame check sequence. Note 2: Frames usually consist of a representation of the original data to be transmitted, together with other bits which may be used for error detection or control. Additional bits may be used for routing, synchronization, or overhead information not directly associated with the original data. 2. In the multiplex structure of pulse-code modulation (PCM) systems, a set of consecutive time slots in which the position of each digit can be identified by reference to a frame-alignment signal. Note: The frame-alignment signal does not necessarily occur, in whole or in part, in each frame. 3. In a time-division multiplexing (TDM) system, a repetitive group of signals resulting from a single sampling of all channels, including any required system information, such as additional synchronizing signals. Note: "In-frame" is the condition that exists when there is a channel-to-channel and bit-to-bit correspondence, exclusive of transmission errors, between all inputs of a time-division multiplexer and the output of its associated demultiplexer. 4. In ISDN, a block of variable length, labeled at the Data Link Layer of the Open Systems Interconnection--Reference Model. 5. In video display, the set of all picture elements that represent one complete image. Note: In NTSC and other television standards used throughout the world, a frame consists of two interlaced fields, each of which has half the number of scanning lines, and consequently, half the number of pixels, of one frame. 6. In video display, one complete scanned image from a series of video images. Note: A video frame is usually composed of two interlaced fields. 7. In computer screen displays of HTML documents, a portion (usually rectangular) of the screen where one usually finds the same types of fields/information displayed, in the same manner as one usually finds the same or similar information displayed in the same segment of different copies of a printed form. 8. An HTML feature that allows multiple Web pages to be viewed simultaneously (by means of scrolling or re-sizing) through a browser window.











These definitions were prepared by ATIS Committee PRQC
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