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List of terms
Nortel Multiservice Switch 7400/15000/20000
Terminology
NN10600-005 7.2S1 Standard
PCR7.2 and up March 2006
Copyright © 2006, Nortel Nortel Confidential
ATM adaptation layer type 1 (AAL1)
An AAL protocol used to transfer constant bit rate traffic such as voice and
video.
ATM adaptation layer type 2 (AAL2)
An AAL protocol used to transfer variable bit rate traffic.
ATM adaptation layer type 5 (AAL-5)
An AAL protocol used to transfer variable bit rate, delay-tolerant, connection-
oriented traffic that requires minimal sequencing or error detection support.
ATM anycast capability
An ATM routing and signaling feature that allows a user to request a point-to-
point connection to a single ATM end system that is part of an ATM group.
ATM bearer service (ABS)
Nortel Multiservice Switch ATM node’s bearer service allows ATM users and
external equipment (ATM hubs, routers, workstations, servers, and video-
conferencing equipment) access to the
Multiservice Switch network. This
service provides sequence-preserving connection-oriented cell transfer
between source and destination with a defined quality of service and
throughput.
ATM bus controller (ABC)
A bus controller on a Nortel Multiservice Switch ATM node’s function
processor.
ATM interface CAC (AtmIf-CAC)
A connection admission control (CAC) technique that applies to independent
virtual channel connections (VCC) and virtual path connections (VPC) under
an ATM interface. Compare with
virtual path termination CAC (VPT-CAC)
(page 143).
AtmIf-CAC
See ATM interface CAC (AtmIf-CAC) (page 13).
ATM inter-network interface (AINI)
ATM Forum standard signaling protocol that provides interconnection
between Nortel Multiservice Switch nodes as well as interconnection between
Multiservice Switch and non-Multiservice Switch nodes (Nortel Networks-
family devices and devices from other vendors).