- Industry: 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 synchronized parallel bit streams, a redundancy check (a) that is based on the formation of a block check following preset rules, (b) in which the check-formation rule applied to blocks is also applied to characters, and (c) in which the check is made on parallel bit patterns. Note 1: When the TRC is based on a parity bit applied to each character and block, the TRC can only detect, with limited certainty, whether or not there is an error. It cannot correct the error. Detection cannot be guaranteed because an even number of errors in the same character or block will escape detection, regardless of whether odd or even parity is used. Note 2: Two-dimensional arrays of bits may be used to represent characters or blocks in synchronized parallel data streams. When TRC is combined with longitudinal redundancy checking (LRC,) individual erroneous bits can be corrected. Synonym vertical redundancy check.
Industry:Telecommunications
In tape relay procedure, the letter and key functions, including the end-of-message indicator, that constitute the last format line.
Industry:Telecommunications
In T-carrier, a basic digital signaling rate of 64 kb/s, corresponding to the capacity of one voice-frequency-equivalent channel. Note 1: The DS0 rate forms the basis for the North American digital multiplex transmission hierarchy. Note 2: The DS0 rate may support twenty 2. 4-kb/s channels, or ten 4. 8-kb/s channels, or five 9. 67-kb/s channels, or one 56-kb/s channel, or one 64-kb/s clear channel.
Industry:Telecommunications
In T-carrier, a synchronization frame that delineates 12 DS1 frames. 2. A DS1 framing format that assembles 12 individual DS1 frames into a single superframe with a 12-bit fixed frame pattern.
Industry:Telecommunications
In T-carrier, a synchronization frame that delineates 24 DS1 frames Note: ESF requires less frequent synchronization than the T-carrier D-4 superframe format. This frees overhead bits for on-line, real-time testing, and monitoring of circuit parameters. ESF also facilitates nonchannelized operation and clear-channel operation.
Industry:Telecommunications
In TCP/IP, a protocol function that tests the ability of a computer to communicate with a remote computer by sending a query and receiving a confirmation response.
Industry:Telecommunications
In TDM carrier systems, a time slot starting at a particular phase or instant in each frame and allocated to the transmission of signaling (supervisory and control) data.
Industry:Telecommunications
In telecommunications and data processing systems, one or more characters used to identify, name, or characterize the nature, properties, or contents of a set of data elements. 2. A string of bits or characters that names an entity, such as a program, device, or system, in order that other entities can call that entity. 3. In programming languages, a lexical unit that names a language object, such as a variable, array, record, label, or procedure. Note: An identifier is placed in a label. The label is attached to, is a part of, or remains associated with, the information it identifies. If the label becomes disassociated from the information it identifies, the information may not be accessible.
Industry:Telecommunications
In telecommunications network management, a function that routes or acts on information passing between network elements and network operations. Note 1: Examples of mediation functions are communications control, protocol conversion, data handling, communications of primitives, processing that includes decision-making, and data storage. Note 2: Mediation functions can be shared among network elements, mediation devices, and network operation centers.
Industry:Telecommunications
In telecommunications systems, a device used to protect facilities and equipment from abnormally high voltages or currents. Note 1: A protector may contain arresters. Note 2: Protectors may be designed to operate on short-duration phenomena, or long-duration phenomena. The duration should be specified.
Industry:Telecommunications
