Panasonic 1200N User Manual

LAN Emulation: The set of services, functional groups and protocols which 
provide for the emulation of LANs utilizing ATM as a backbone to allow 
connectivity among LAN and ATM attached end stations. 

Link Access Procedure D: A layer 2 protocol defined by CCITT (original name of 
ITU-T). This protocol reliably transfers blocks of information across a single Layer 
1 link and supports multiplexing of different connections at Layer 2. 

An active element within a layer. 

A part of the activity of the layer entities. 

A capability of a layer and the layers beneath it that is provided to the upper layer 
entities at the boundary between that layer and the next higher layer. 

Data transferred between corresponding entities on behalf of the upper layer or 
layer management entities for which they are providing services. 

Leaky Bucket: Leaky Bucket is the term used as an analogous description of the 
algorithm used for conformance checking of cell flows from a user or network. See 
GCRA, UPC and NPC. The "leaking hole in the bucket" applies to the sustained 
rate at which cells can be accommodated, while the "bucket depth" applies to the 
tolerance to cell bursting over a given time period. 

LAN Emulation. Refer to LANE. 

Light Emitting Diode: A semiconductor diode that emits light when a current 
passes through it. LEDs are often used for alarm and power indication lights on 
equipment.