Installation guide

Glossary
GL-21
Cisco 6260 Hardware Installation Guide
OL-2365-02
Open System
Interconnection
See OSI.
operations,
administration,
management, and
provisioning
See OAM&P.
Operations Support
System
See OSS.
octal-port DMT
ATU-C line card
See 8xDMT.
octal-port ITU-C line
card
See 8xIDSL.
octal-port SHTU-C
line card
See 8xG.SHDSL.
Optical Carrier
See OC.
optical fiber
See MMF and SMF.
OSI
Open System Interconnection. An international standardization program created by ISO and ITU-T to
develop standards for data networking that facilitate multivendor equipment interoperability. See
also ISO.
OSS
Operations Support System. Network management system supporting a specific management
function, such as alarm surveillance and provisioning, in a carrier network.
P
PAM
pulse amplitude modulation. Modulation scheme where a continuous analog signal is represented with
a series of discrete analog samples, which are then recreated as a complete signal. Sampling allows
several signals to be combined on a channel that would otherwise carry only one signal. Compare with
AM and FM. See also modulation.
parent
See subtending host chassis.
PEM
power entry module. A hardware module that distributes power throughout a DSLAM.
performance
management
One of five categories of network management defined by ISO for the management of ISO networks.
Performance management subsystems are responsible for analyzing and controlling network
performance, including network throughput and error rates. See also accounting management,
configuration management, fault management, and security management.
permanent virtual
circuit
See PVC.
permanent virtual
connection
See PVC.