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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
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.