A capability of the (N) layer and the layers beneath it, which is provided to (N + 1) layer entities, at the boundary between the (N) layer and the (N + 1) layer. [T1.110-1987]

An indivisible component of the layer service made visible to the service user via layer service primitives. [T1.110-1987]

A means for specifying in detail the adjacent layer interactions. [T1.110-1987]

Data transferred between corresponding entities on behalf of the upper layer or layer management entities for which they are providing services. [T1.630-1999]

The protocol reference model defined by layered structures based on and using the terminology of ITU-T Recommendations X.200 and X.21
0. The protocols referred to in this American National Standard conform to the OSI Reference Model for ISDN specified in ITU-T Recommendation I.32
0. [After T1.218-1991] [T1.603-1990] [T1.604-1990]

A system in which components are grouped, i.e., layered, in a hierarchical arrangement, such that lower layers provide functions and services that support the functions and services of higher layers.
Note: Systems of ever-increasing complexity and capability can be built by adding or changing the layers to improve overall system capability while using the components that are still in place.

Abbreviation for line buildout. Synonym building out.

Location Based Services

Link Capacity Adjustment Scheme

Abbreviation for liquid crystal display.