Cisco 10000 Series Configuration Manual page 352

Glossary
Class-based weighted random early detection. Class-based WRED applies WRED to packets in
CB-WRED
different traffic classes. See also WRED.
Communication path. Multiple channels can be multiplexed over a single cable in certain environments.
Channel
See CSU.
Channel service unit
Cisco system software that provides common functionality, scalability, and security for Cisco products.
Cisco IOS
Cisco IOS allows centralized, integrated, and automated installation and management of internetworks,
while ensuring support for a wide variety of protocols, media, services, and platforms.
Clear channel DS3
A framed DS3 signal that is not multiplexed from 28 DS1 signals. Sometimes referred to as
unchannelized DS3.
Command line interface. Interface that allows the user to interact with the operating system by entering
CLI
commands and optional arguments at the command prompt.
See CLI.
Command Line
Interface
See CAR.
Committed access
rate
Cyclic redundancy check. Error-checking technique in which the frame recipient calculates a remainder
CRC
by dividing frame contents by a prime binary divisor and then compares the calculated remainder to a
value stored in the frame by the sending node.
An alarm condition that might affect most or all subscribers that connect to the reporting node. To
Critical alarm
obtain more information about a problem, use the
show facility-alarm status command. See also
Channel service unit. Digital interface device that connects end-user equipment to the local digital
CSU
telephone loop. Often referred to, together with DSU, as CSU/DSU. See also DSU.
See CRC.
Cyclic redundancy
check
D
See DSU.
Data service unit
See DSCP.
Differentiated
service code point
Digital signal level 0. Framing specification used in transmitting digital signals over a single channel
DS0
at 64 kbps on a T1 facility. Compare with
Digital signal level 1. Framing specification used in transmitting digital signals at 1.544 Mbps on a T1
DS1
facility (in the United States) or at 2.108 Mbps on an E1 facility (in Europe). Compare with
DS3.
Digital signal level 3. Framing specification used for transmitting digital signals at 44.736 Mbps on a
DS3
T3 facility. Compare with
Cisco 10000 Series Router Line Card Configuration Guide
GL-2
Major alarm
DS1 and DS3.
DS0 and DS1.
and Minor alarm.
DS0 and
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