Panasonic 1200N manual Osc, Osi, Ospf, Oui

Glossary O

OSC

Oscillator: A device for generating an analog test signal or an electronic circuit that creates a single frequency signal.

OSI

Open Systems Interconnection: A seven (7) layer architecture model for communications systems developed by the ISO for the interconnection of data communications systems. Each layer uses and builds on the services provided by those below it.

OSI Physical Layer

Usually taken to be SONET/SDH (which itself has 4 layers...) but can be other things as well. The PHY deals with medium-related issues.1

OSPF

Open Shortest Path First: A link-state routing algorithm that is used to calculate routes based on the number of routers, transmission speed, delays and route cost.

OUI

Organizationally Unique Identifier: The OUI is a three-octet field in the IEEE 802.1a defined SubNetwork Attachment Point (SNAP) header, identifying an organization which administers the meaning of the following two octet Protocol Identifier (PID) field in the SNAP header. Together they identify a distinct routed or bridged protocol.

Outlier

A node whose exclusion from its containing peer group would significantly improve the accuracy and simplicity of the aggregation of the remainder of the peer group topology.

Outside Link

A link to an outside node.

Outside Node

A node which is participating in PNNI routing, but which is not a member of a particular peer group.

1.ICell Relay Retreat. Indiana University 25 August 1996 http://cell-relay.indiana.edu/cell-relay/

Centillion 1200N ATM Switch User Manual	B-53
NTP 297-8103-903