Distortion resulting from causes generally subject to laws concerning random occurrences.

A computer conference devoted to a specific subject, having an initiator, members, readers, and possibly moderators. [2382-pt.35] Synonyms chat group, discussion group, discussion list, discussion thread, followup, interest group, library, newsgroup, yythread.

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.

The channel of a data circuit that transmits data from the originating user to the destination user.
Note: The forward channel carries message traffic and some control information.

In a transmission line, an echo propagating in the same direction as the original wave and consisting of energy reflected back by one discontinuity and then forward again by another discontinuity.
Note: Forward echoes can be supported by reflections caused by splices or other discontinuities in the transmission medium (e.g., optical fiber, twisted pair, or coaxial tube). In metallic lines,… (Read More →)

A system of error control for data transmission wherein the receiving device has the capability to detect and correct any character or code block that contains fewer than a predetermined number of symbols in error.
Note: FEC is accomplished by adding bits to each transmitted character or code block, using a predetermined algorithm.

A bit in a signal unit which indicates the start of a retransmission cycle. [T1.226-1992]

Synonym ionospheric scatter.

The data reconstitution of a later version of data by using an earlier version and data recorded in a journal. [2382-pt.8]

The deflection--by diffraction, nonhomogeneous refraction, or nonspecular reflection by particulate matter of dimensions that are large with respect to the wavelength in question but small with respect to the beam diameter--of a portion of an incident electromagnetic wave, in such a manner that the energy so deflected propagates in a direction that is within 90° of the direction of propagation… (Read More →)