- 産業: 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 communications systems, the maximum degree of signal distortion that can be tolerated without affecting the restitution, i.e., without its being interpreted incorrectly by the decision circuit. 2. The allowable error rate, deviation from normal, or degradation of the performance of, a system or device.
Industry:Telecommunications
In communications systems, the connector at the interface point between the bus interface unit and the terminal, i.e., the medium interface point.
Industry:Telecommunications
In communications systems, the altering of the characteristics of a signal to make the signal more suitable for an intended application, such as optimizing the signal for transmission, improving transmission quality and fidelity, modifying the signal spectrum, increasing the information content, providing error detection and/or correction, and providing data security. Note: A single coding scheme usually does not provide more than one or two specific capabilities. Different codes have different advantages and disadvantages. 2. In communications and computer systems, implementing rules that are used to map the elements of one set onto the elements of another set, usually on a one-to-one basis. 3. The digital encoding of an analog signal and, conversely, decoding to an analog signal.
Industry:Telecommunications
In communications systems, assembling a number of narrowband channels, such as 4-kHz-wide telephone channels, into a specified frequency band such that, after pregroup translation, they may be formed with other pregroups into a standard group, such as an ITU-T basic group, by frequency-division multiplexing.
Industry:Telecommunications
In communications systems, pertaining to communications facilities and services provided to essentially all users in the area served by the system, rather than to one user or to a relatively small number of users, such as a closed user group with outgoing access.
Industry:Telecommunications
In communications systems, any device that (a) can sense an abnormal condition within the system and provide a signal indicating the presence or nature of the abnormality to either a local or remote alarm indicator, and (b) may detect events ranging from a simple contact opening or closure to a time-phased automatic shutdown and restart cycle. 2. In a physical security system, an approved device used to indicate a change in the physical environment of a facility or a part thereof. Note: Alarm sensors may also be redundant or chained, such as when one alarm sensor is used to protect the housing, cabling, or power protected by another alarm sensor.
Industry:Telecommunications
In communications systems, an audible signal transmitted by a system indicating that the system is ready to receive a message or signal.
Industry:Telecommunications
In communications systems, a message, i.e., an assembly of signaling information, that (a) includes associated message alignment and service indications, (b) pertains to a call, and (c) is transferred via the message transfer part.
Industry:Telecommunications
In communications systems, a mechanical, electro-mechanical, or electronic device for making, breaking, or changing the connections in or among circuits. 2. Deprecated synonym for central office, switching center. 3. In communications systems, to transfer a connection from one circuit to another. 4. In a computer program, a conditional instruction and a flag that is interrogated by the instruction. 5. In a computer program, a parameter that controls branching and that is bound, prior to the branch point being reached. Synonym switchpoint. 6. In computer programming, a programming technique or statement for making a selection, such as a conditional jump. 7. In computer software applications, a functional unit, such as a toggle button, used to make selections.
Industry:Telecommunications
In communications systems, a facility in which switches are used to interconnect communications circuits on a circuit-, message-, or packet-switching basis. Synonyms, in telephony, central office, switching exchange, switching facility. Deprecated synonym yyswitch.
Industry:Telecommunications
