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