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List of terms

CPP

See control plane protection (CPP) (page 35)

CPCS

See common part convergence sublayer (CPCS) (page 31)

CPE

Customer premises equipment.

CPeD

A control processor with external (BITS) DS1 timing support.

C-plane

See control plane (C-plane) (page 34).

CQC

See cell queue controller (CQC) (page 26).

CQC function processor

A type of Nortel Multiservice Switch ATM node function processor that uses a cell queue controller (CQC) ASIC. This type of function processor was the original ATM FP on Multiservice Switch nodes.

CQM

See cell queue memory (CQM) (page 26).

crankback

A mechanism in ATM networking that partially releases a connection setup in progress when that setup request encounters a failure in the network. This mechanism allows ATM routing protocols to perform alternate routing.

CR

See call router (CR) (page 23).

critical IP address

An IP interface on the local router. If the VRRP virtual router configuration includes a critical IP interface address, a change in state to that IP interface causes a role switch in that VRRP virtual router.

CRC-4

A cyclic redundancy check pattern used on an E1 line.

CRC-6

A cyclic redundancy check pattern used in extended superframe (ESF) mode on a DS1 line.

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 Cpp, Cpcs, Cpe, Cqc, Cqm, CRC-4, CRC-6