Synonym dual-tone multifrequency signaling.

See interference filter.

1. In cryptosystems, a functional unit that can simultaneously process data of two or more security levels without risk of compromising computer security. [2382-pt.8]
2. A device that is used in a manner that permits it to simultaneously process data of two or more security levels without risk of compromise. To accomplish this sensitivity labels are normally stored on the… (Read More →)

[An] Information systems (IS) mode of operation wherein all the following statements are satisfied concerning the users who have direct or indirect access to the system, its peripherals, remote terminals, or remote hosts: (a) some users do not have a valid security clearance for all the information processed in the IS: (b) all users have the proper security clearance and… (Read More →)

See n-ary code.

In military communications, a priority scheme (a) for assigning one of several precedence levels to specific calls or messages so that the system handles them in a predetermined order and time frame, (b) for gaining controlled access to network resources in which calls and messages can be preempted only by higher priority calls and messages, (c) that is recognized only… (Read More →)

A class of system containing information with different sensitivities that simultaneously permits access by users with different security clearances and needs-to-know, but prevents users obtaining access to information for which they lack authorization [TCSEC].

1. [The] concept of processing information with different classifications and categories that simultaneously permits access by users with different security clearances and denies access to users who lack authorization. [INFOSEC-99]
2. A system operating in this mode is one which stores and/or processes data at various classifications etc, but for which there are users not cleared for or who need… (Read More →)

In packet-switched networks, the simultaneous use of multiple links for the transmission of different segments of the same message unit.
Note: Use of multilink operation is intended to increase the effective rate of message transmission. Multilink operation requires special procedures for multiplexing/demultiplexing control.

Pertaining to the processing and integrated presentation of information in more than one form, e.g., video, voice, music, or data.