Specifications

GL-1
Cisco MGX 8850 (PXM45) and MGX 8950 Software Configuration Guide
Release 3, Part Number 78-14788-01 Rev. C0, January 2004
GLOSSARY
A
ABR
Available bit rate is a Class of Service defined for ATM connections by the ATM Forum. Devices using
ABR are guaranteed no more than a certain rate of throughput. This rate dynamically changes and the
current value is relayed to the sending device by way of Resource Management (RM) cells.
ACR
Available cell rate.
AESA
ATM End Station Address. The 19-octet address that uniquely identifies each logical node.
AINI
ATM Inter-Network Interface.
Annex G
A bidirectional protocol, defined in Recommendation Q.2931, used for monitoring the status of
connections across an UNI interface. The BPX SES PNNI controller uses the Annex G protocol to pass
connection status information between a itself and the BPX 8600 switch.
APS
Automatic Protection Switching.
ATM
Asynchronous Transfer Mode.
AW
Administration Weight.
AXSM
ATM Switch Service Module.
AXSM/B
Newer version of the AXSM card. Provides better support for APS line switching.
AXSM-E
AXSM Enhanced card. Provides more traffic policing and statistics features than AXSM and AXSM/B.
B
BITS
Building Integrated Timing System.
C
CBR
Constant bit rate is used by a connection that requests a static amount of bandwidth, for continuous
availability during the connection lifetime.
CDV
Cell Delay Variation.
Cisco IOS
Cisco Internet Operating System.
Class of Service
(CoS) Buffer
A buffer or queue which serves connections with similar QoS requirements.