A carrier authorized to provide telecommunications services both within and outside World Zone 1 using the yyNorth American Numbering Plan (NANP)and the international dialing plan, respectively. [T1.104-1988]

Local communications service provided by GSA to all Federal agencies located in a building, complex, or geographical area.

In video, an image coding system that derives a luminance signal and two bandwidth-limited color-difference signals, to provide luminance information that is encoded into one signal supplemented by, but totally independent of, two color signals carrying only chrominance information, i.e., hue and saturation.
Note 1: Constant luminance is only achieved when the luminance and chrominance vectors are derived from linear… (Read More →)

The process of creating a Target of Evaluation [ITSEC].

A service feature that allows a speaker on an extension instrument to place one call on hold and to speak with another caller on a separate line.

A term used to denote either an IPTV Subscriber or an IPTV User (see also IPTV Consumer).

The domain where the IPTV services are consumed. In the consumer domain, a single terminal may be used for service consumption, but also a network of terminals and related devices may be present for this purpose. The domain may also be a mobile end device in this case the delivery system of a network provider is a wireless Wide Area… (Read More →)

A device within the Consumer Domain such as an ITF or a DNG.

1. The introduction of data of one security [classification or] security category into data of a lower security classification or different security category. [2382-pt.8] [INFOSEC-99].
2. Relative to numbering guidelines and FCC regulations, contamination occurs when at least one telephone number within a thousands-block of telephone numbers is not available for assignment to end users or customers. Blocks contaminated up… (Read More →)

1. In Web terminology, the text, media, and links or information displayed by a browser at a particular Web site.
2. Electronic or mechanical representation, in analog or digital form, of audiovisual data consisting of individually or in composite form still or moving images, audio, text, or graphics to include related data and metadata.