A voice or data communications circuit that (a) serves as a transmission link between adjacent communications facilities that are interconnected by a transmission link and (b) is used only for coordination and control of link activities, such as traffic monitoring and traffic control.

A set of rules relating to data communications over a data link.
Note: Link protocols define data link parameters, such as transmission code, transmission mode, control procedures, and recovery procedures.

In adaptive high-frequency (HF) radio, the overall process by which measurements of signal quality are made, assessed, and analyzed.
Note 1: In LQA, signal quality is determined by measuring, assessing, and analyzing link parameters, such as bit error ratio (BER), and the levels of the ratio of signal-plus-noise-plus-distortion to noise-plus-distortion (SINAD). Measurements are stored at--and exchanged between--stations, for use in… (Read More →)

A set of signaling links directly connecting two signaling points. [T1.226-1992]

The control that coordinates functions of the signaling link, including signal unit delimitation, signal unit alignment, error detection, error correction, initial alignment, signaling link error monitoring, and flow control. [T1.110-1987]

A signal unit that contains status information about the signaling link in which it is transmitted. [T1.110-1987]

The individual application of encipherment to data on each link of a communications system [7498-2].
Note: The implication of link-by-link encipherment is that the data will be in cleartext form in relay entities. See also: End-To-End Encipherment.

In computer security, the purposeful combining of data or information from one data processing system with data or information from another system to derive protected information. [After 2382-pt.8] Synonym fusion.

A type of AllCall registration feature, the use of which combines the registrations for incoming and outgoing calls for the current terminal address in a single procedure. However, unlike AllCall registration, a linked registration cannot be overridden in all or in part by: (a) InCall, remote InCall, AllCall, or remote AllCall registrations by the same UPT (Universal Personal Telecommunications service)… (Read More →)

In adaptive high-frequency (HF) radio, protection intended to prevent the establishment of unauthorized links or the unauthorized manipulation of legitimate links, and which are administered through an authorization process. [After FED-STD-1049/1]