Cisco ONS 15454 SDH Specifications Page 467

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Glossary
GL-5
Cisco ONS 15454 SDH Installation and Operations Guide, R3.3
May 2002
CEV
Controlled Environment Vaults.
CLEI
Common Language Equipment Identifier code.
CLNP
Correctionless Network Protocol.
cm
Centimeter.
CMIP
Common Management Information Protocol.
COE
Central Office Environment.
Collision
In Ethernet, the result of two nodes transmitting simultaneously. The frames from each device impact and are damaged when
they meet on the physical media.
Concatenation
A mechanism for allocating contiguous bandwidth for payload transport. Through the use of Concatenation Pointers, multiple
OC-1s can be linked together to provide contiguous bandwidth through the network, from end to end.
CORBA
Common Object Request Broker Architecture.
CPE
Customer Premise Environments.
Crosspoint
A set of physical or logical contacts that operate together to extend the speech and signal channels in a switching network.
CTAG
(Correlation Tag). A unique identifier given to each input command by the TL1 operator. When the ONS 15454 system
responds to a specific command, it includes the commands CTAG in the reply. This eliminates discrepancies about which
response corresponds to which command. See also ATAG.
CTC
(Cisco Transport Controller). A Java-based graphical user interface (GUI) that allows operations, administration, maintenance,
and provisioning (OAM&P) of the ONS 15454 using an Internet browser.
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