- 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.
A technique for organizing and coding computer programs in which a hierarchy of modules is used, each having a single entry and a single exit point, and in which control is passed downward through the structure without unconditional branches to higher levels of the structure. Three types of control flow are used: sequential, test, and iteration.
Industry:Telecommunications
A technique for transferring data (usually over the Internet) in a continuous flow to allow large multimedia files to be viewed before the entire file has been downloaded to a client's computer.
Industry:Telecommunications
A technique of transmitting data by dividing the data into several interleaved bit streams and using these to modulate several carriers. Note: MCM is a form of frequency-division multiplexing.
Industry:Telecommunications
A technique or device designed to bring about a desired state by means of its own action. 2. That part of a computer program that may be used to establish another version of the computer program. 3. The automatic procedure whereby the basic operating system of a processor is reloaded following a complete shutdown or loss of memory. 4. A set of instructions that cause additional instructions to be loaded until the complete computer program is in storage. 5. To initialize a system by means of a bootstrap.
Industry:Telecommunications
A technique that allows packets to be simultaneously transmitted over the Mbone (multicast backbone on The Internet) to a selected set of destinations. Note: Standard Internet traffic requires a separate set of packets for each destination. IP multicast allows for one set of packets to be sent to multiple destinations.
Industry:Telecommunications
A technique that provides real-time data on high-frequency ionospheric-dependent radio propagation, using a basic system consisting of a synchronized transmitter and receiver. Note: The time delay between transmission and reception is translated into effective ionospheric layer altitude. Vertical incident sounding uses a collocated transmitter and receiver and involves directing a range of frequencies vertically to the ionosphere and measuring the values of the reflected returned signals to determine the effective ionosphere layer altitude. This technique is also used to determine the critical frequency. Oblique sounders use a transmitter at one end of a given propagation path, and a synchronized receiver, usually with an oscilloscope-type display (ionogram,) at the other end. The transmitter emits a stepped- or swept-frequency signal which is displayed or measured at the receiver. The measurement converts time delay to effective altitude of the ionospheric layer. The ionogram display shows the effective altitude of the ionospheric layer as a function of frequency.
Industry:Telecommunications
A technique used by hackers to access computer systems by modifying packet headers to make them appear to have originated from a trusted port. 2. The practice of falsifying an e-mail header to make it appear as though it originated from a different address.
Industry:Telecommunications
A technique used to locate a given sector, a desired track, and a specific record by continuous comparison of the read/write head position with appropriate synchronization signals.
Industry:Telecommunications
A technique whereby the frequency of the local oscillator is slowly swept past the reference in order to assure that the pull-in range is reached.
Industry:Telecommunications
A technique, applicable to access circuits, that permits an outgoing routine call to be dialed by the PBX user after the PBX attendant has established the initial connection.
Industry:Telecommunications
