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List of terms

availability-bit signaling

The availability-bit (A-bit) signaling technique exchanges availability status between the two ends of a frame relay permanent virtual channel (PVC) connection. A-bit signaling permits each end of a PVC to determine if the remote end is ready to process data.

availability message packet (AMP)

An availability message packet (AMP) is a status message sent by a hunt group member to its hunt group server. A hunt group member sends an AMP each time its availability status changes significantly.

available bit rate (ABR)

An ATM service category. ABR permits dynamic allocation of bandwidth to applications that are highly tolerant of cell delay and delay variance, such as LAN interconnection. ABR traffic is characterized as very bursty.

available cell rate (ACR)

The available capacity of an ATM link. In general, ACR refers to links that are already in use by one or more ATM connections.

B-channel

See bearer channel (B-channel) (page 19).

B-ICI

See broadband inter-s interface (B-ICI) (page 21).

B3ZS

See binary 3 zero substitution (B3ZS) (page 19).

B8ZS

See binary 8 zero substitution (B8ZS) (page 19).

backbone

A group of interconnected core nodes that normally tandem traffic. A backbone node exchanges full topology information with all nodes in the same topology region that are not cluster nodes. The backbone exchanges limited routing and no topology information with clusters. The backbone does not exchange any information with nodes in other topology regions.

backbone border node

Nortel Multiservice Switch nodes that reside on a backbone boundary, connected by backbone-cluster border links to cluster nodes.

backbone node

Nortel Multiservice Switch nodes that reside within a backbone.

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 Ici, B3ZS, B8ZS