The term number portability means the ability of users of telecommunications services to retain, at the same location, existing telecommunications numbers without impairment of quality, reliability, or convenience when switching from one telecommunications carrier to another (47 CFR§
5
2. 21 (m)).

Services Discovery is the process by which an ITF receives the necessary data elements which enable the ITF to access the available IPTV Services.

Information that identifies the local serving area where the network provider operates. [After T1.667-1999]

The simultaneous participation of a plurality of devices or networks in supporting a session as well as merging two or more existing sessions into a single session.

An encryption key that provides privacy during a call and may be changed dynamically by the system. [T
1. Rpt22-1993]

See Open Systems Interconnection--Reference Model.

1. A finite or infinite number of objects, entities, or concepts, that have a given property or properties in common.
2. To configure all or part of a device into a specified state.

Abbreviation for secure electronic transaction.

Referring to an auxiliary device that usually rests on top of or adjacent to a television receiver and that is used in direct analog or digital satellite transmissions and digital television to be viewed on analog television; a set-top device may convert cable TV or Web signals to a form or format that allows end-user channel selection or interaction via… (Read More →)

When used by a telco, this typically describes a box that translates the IPTV services running across the home netowork and makes them displayable to the TV (includes the video decode function, EPG function, DRM, games, ITV, personalization, etc. ). See also, set-top, set-top converter.