- 産業: Telecommunications
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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 telephone system, an exchange in which communications among users are effected by means of switches set in operation by the originating user equipment without human intervention at the central office or branch exchange.
Industry:Telecommunications
In a telephone network, nondeterministic routing in which a dialed number received at a switch is transmitted to all switches, i.e., flooded, in the area code directly connected to that switch; if the dialed number is not an affiliated subscriber at that switch, the number is then retransmitted to all directly connected switches, and then routed through the switch that has the dialed number corresponding to the particular user end instrument affiliated with it. Note 1: All digits of the numbering plan are used to identify a particular subscriber. Note 2: Flood search routing allows subscribers to have telephone numbers independent of switch codes. Note 3: Flood search routing provides the highest probability that a call will go through even though a number of switches and links fail.
Industry:Telecommunications
In a telecommunications, computing, or data processing system, to examine entities that are being processed to determine their suitability for further processing. 2. A nonferrous metallic mesh used to provide electromagnetic shielding. 3. To reduce undesired electromagnetic signals and noise by enclosing devices in electrostatic or electromagnetic shields. 4. A viewing surface, such as that of a cathode ray tube or liquid crystal display (LCD. )
Industry:Telecommunications
In a telecommunications system, the physical interface between the local access and transport area (LATA) access and inter-LATA functions. Note: The POI is used to establish the technical interface, the test points, and the points of operational responsibility. Synonym interface point.
Industry:Telecommunications
In a telecommunications system, a test point, i.e., a point where a signal may be inserted or measured, and for which the nominal power of a test signal is specified. Note 1: In practice, the abbreviation, TLP, is usually used, and it is modified by the nominal level for the point in question. For example, where the nominal level is 0 dBm, the expression 0 dBm TLP, or simply, 0TLP, is used. Where the nominal level is -16 dBm, the expression -16 dBm TLP, or -16TLP, is used. Note 2: The nominal transmission level at a specified TLP is a function of system design and is an expression of the design gain or loss. Note 3: Voice-channel transmission levels, i.e., TLPs, are usually specified for a frequency of approximately 1000 Hz. Note 4: The TLP at a point at which an end instrument, e. G. , a telephone set, is connected is usually specified as 0 dBm.
Industry:Telecommunications
In a telecommunications system, a feature in which supervisory signals are forwarded in advance of address signals in order to seize assets of the system before attempting to establish a connection.
Industry:Telecommunications
In a telecommunications system, a demand by a user for a connection to another user. Note: In telephone traffic analysis, call attempts are counted during a specific time frame. The call-attempt count includes all completed, overflowed, abandoned, and lost calls.
Industry:Telecommunications
In a telecommunications link or line facility, interference, from any source, that degrades performance. Note 1: Line noise is usually measured as a signal-to-noise ratio and as a set parameter used by engineers to determine the operating range of the system. Note 2: In analog lines, noise is usually measured in dbrnc (dB relative to -90 dBm, with C-message weighting. ) Note 3: In digital lines, noise is usually measured as a function of the number of errored bits per second or errors in the digital data stream. In digital systems with signal buffers, these errors may be linked to alarms, and to circuitry that enables the signal to be recovered to acceptable degree.
Industry:Telecommunications
In a telecommunications context, a telecommunications company that holds itself out to the public for hire to provide communications transmission services. Note: In the United States, such companies are usually subject to regulation by Federal and state regulatory commissions. Synonyms carrier, commercial carrier, communications common carrier, interexchange carrier.
Industry:Telecommunications
In a telecommunication system, the elapsed time between the start of an access attempt and successful access. Note: Access time values are measured only on access attempts that result in successful access. 2. In a computer, the time interval between the instant at which an instruction control unit initiates a call for data and the instant at which delivery of the data is completed. 3. The time interval between the instant at which storage of data is requested and the instant at which storage is started. 4. In magnetic disk devices, the time for the access arm to reach the desired track and the delay for the rotation of the disk to bring the required sector under the read-write mechanism.
Industry:Telecommunications
