- 업종: Telecommunications
- Number of terms: 29235
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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 switched public telecommunications network, a facility that connects trunks to trunks and does not connect any local loops.
Industry:Telecommunications
In a switched network, the time between the completion of signaling by the call originator and the arrival of a ringing signal at the call receiver. Note: Queues may be caused by delays at the originating switch, intermediate switches, or the call receiver servicing switch. 2. In a data network, the sum of the delays between the request for service and the establishment of a circuit to the called data terminal equipment (DTE. ) 3. In a packet-switched network, the sum of the delays encountered by a packet between the time of insertion into the network and the time of delivery to the addressee.
Industry:Telecommunications
In a switched network, switching in which the routes between given pairs of nodes are pre-programmed, i.e., are determined, in advance of transmission. Note: The routes used to complete a given call through a network are identified, in advance of transmission, in routing tables maintained in each switch database. The tables assign the trunks that are to be used to reach each switch code, area code, and International Access Prefix (IAP,) usually with one or two alternate routes. 2. In a non-switched network, routing in which the routes between given pairs of nodes are determined in advance. Note: The routes used to send a given message through a network are identified in advance in routing tables maintained in a database.
Industry:Telecommunications
In a switch or network node, software designed to store and forward frames between nodes. Note: An NCP may be used in local area networks or larger networks.
Industry:Telecommunications
In a strict sense, the region of the electromagnetic spectrum that can be perceived by human vision, i.e., the visible spectrum, which is approximately the wavelength range of 0. 4 m to 0. 7 m. Note 1: In the laser and optical communications fields, custom and practice have extended usage of the term light to include the much broader portion of the electromagnetic spectrum that can be handled by the basic optical techniques used for the visible spectrum. Note 2: The region embraced by the term light has not been clearly defined, but by convention and usage, is considered to extend from the near-ultraviolet region of approximately 0. 3 m, through the visible region, and into the mid-infrared region to approximately 30 m.
Industry:Telecommunications
In a station, the principal clock, or alternate clock, that provides the timing reference at the station.
Industry:Telecommunications
In a start-stop teletypewriter system, the significant condition of the signal element that immediately precedes a character signal or block signal and prepares the receiving equipment for the reception of the code elements.
Industry:Telecommunications
In a start-stop teletypewriter receiving mechanism, bias generated locally by the mechanism, and which has the same effect on the operating margin as bias external to the receiver, i.e., applied bias. Note: Internal bias may be a marking bias or a spacing bias.
Industry:Telecommunications
In a spread-spectrum communications system, the signal gain, signal-to-noise ratio, signal shape, or other signal improvement obtained by coherent band spreading, remapping, and reconstitution of the desired signal.
Industry:Telecommunications
In a spectrum of frequencies, a region in which the spectral density, i.e., power per hertz, is proportional to the frequency.
Industry:Telecommunications
