See user information bit.

A single-digit data element in the 7-digit format that is outpulsed by the network to indicate the numbering plan digit (NPD) and CESID (caller's emergency service ID) display status. In the 10-digit format, two information digits used to indicate the CESID display status. The information digit or digits can also indicate a maintenance test call. [T1.414-1998]

The return of received data to the source, usually for the purpose of checking the accuracy of transmission by comparison with the original data.

In data transmission, a field assigned to contain user information.
Note: The contents of the information field are not interpreted at the link level.

See Covert Channel [CESG].

[In COMSEC, a] procedure to ensure that information transfers within an information system (IS) are not made from a higher security level object to an object of a lower security level. [INFOSEC-99]

In a frame-relaying network, the condition when all frames relayed by the network satisfy the frame check sequence check. [After T1.606-1990]

The item visible at the POSIX.6/D13.1 interface that is used for associating labeling information with object data. This information is not related to mandatory access control [POSIX.6].

The operation whereby one information label is combined with another information label. The specific algorithm used to define the result of a combination of two labels is implementation defined [POSIX.6].

The implementation-defined policy that determines to what degree information labels associated with data are automatically adjusted as data flows through the system [POSIX.6].