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List of terms

layer

In the OSI reference model, a collection of related network processing functions that comprise one level of a hierarchy of functions.

LC

1See link controller (LC) (page 72).

2See logical channel (LC) (page 76).

LCN

See logical channel number.

LCo

See logical connection (LCo) (page 76).

LD-CELP

See Low-delay code excited linear prediction (LD-CELP) (page 77).

LDS

See link delay synchronization (LDS) (page 73).

leaf

Is sometimes used interchangeably with party. However, a leaf more accurately denotes any single destination point of a point-to-multipoint call.

LEN

See low-entry networking (LEN) node (page 77).

level

In ATM networking, a level is the position in the PNNI hierarchy at which a particular node or peer group exists. A level that has a smaller numerical value implies greater topology aggregation. Conversely, a level that has a larger numerical value implies less topology aggregation. Smaller numerical values indicate high levels while larger numerical values indicate lower levels.

LG

See link group (LG) (page 73).

LGN

See logical group node (LGN) (page 76).

LGN Horizontal Link Hello protocol

The LGN (logical group node) Horizontal Link Hello protocol is a protocol run over an SVCC RCC channel to discover and monitor logical links between neighboring logical group nodes.

Nortel Multiservice Switch 7400/15000/20000

Terminology

NN10600-005 7.2S1 Standard

PCR7.2 and up March 2006

Copyright © 2006, Nortel

Nortel Confidential

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Panasonic 15000 manual Lcn, Ld-Celp, Lds, Len, Lgn