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
.