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List of terms

LIF

See loss of IMA frame (LIF) (page 77).

line

1A dedicated private or leased facility that connects user equipment to the Nortel Multiservice Switch network. A line can be a link.

2In SONET, a part of a connection between STS-n multiplexers.

3In SDH, a part of a connection between STM-n multiplexers.

line automatic protection switching (APS)

1Automatic protection switching applied to SONET and SDH lines. Sometimes called linear APS in some specifications, such as Telcordia GR-253.

2See automatic protection switching (APS) (page 15)

line sparing

See automatic protection switching (APS) (page 15).

link

1A channel or path between network entities that includes the connection and the interface devices.

2A component model data type used to relate non-hierarchical components. It is represented using an attribute on either component with a value being the other component name. If one side of the link is changed, the other is automatically updated.

link access procedure on frame relay (LAPF)

The data link layer protocol that has been defined for ITU-T Q.921. LAPF is an ISDN access protocol used with links that are established on frame relay.

link access procedure on the D-channel (LAPD)

The data link layer protocol that has been defined for ITU-T Q.921. LAPD is an ISDN access protocol used with links established on a D-channel.

link aggregation (LAG)

Logical grouping of multiple Ethernet links.

link aggregation control protocol (LACP)

This protocol is used to exchange LAG information between two nodes.

link controller (LC)

The integrated circuit (ASIC) that provides a serial data interface into the Nortel Multiservice Switch node.

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 Lif