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List of terms

reachability spanning tree

A collection of PNNI nodes that are reachable from the local PNNI node.

reachable NSAP address

The subcomponents address (provisioned under the Trk component) and summaryAddress (provisioned under the Rtg component) that are broadcast and stored in the Base Routing Topology Database. They are also referred to as reachable addresses. See NN10600-435 Nortel Multiservice Switch 7400/ 15000/20000 Operations: Path-Oriented Routing System for more information.

real-time clock (RTC)

The clock that maintains the current time of day.

real-time statistics

Performance measurements that are collected by the data collection system (DCS) from various applications. These real-time statistics are used for day- to-day troubleshooting activities.

real-time statistics collection interval

The 5-minute collection interval during which real-time statistics (performance measurements) are collected. This interval is based on network time and occurs across the network beginning on the hour.

real time variable bit rate (rt-VBR)

A QOS class that defines a connection’s throughput as tightly constrained for delay and delay variation. Sources are expected to transmit at a rate that varies over time. This QOS supports statistical multiplexing or real-time sources. It is intended to support real-time applications such as voice and video.

RED

See random early detection (RED) (page 110).

reduced cell loss mechanism (RCL)

The reduced cell loss mechanism is a proprietary Nortel Multiservice Switch feature that acts to reduce cell loss while hot swapping the data path during path optimization.

region ID

The attribute that identifies the topology region to which a Nortel Multiservice Switch node belongs. See NN10600-060 Nortel Multiservice Switch 7400/ 15000/20000 Component Reference for more information.

reload

The action of loading software from disk.

Nortel Multiservice Switch 7400/15000/20000

Terminology

NN10600-005 7.2S1 Standard

PCR7.2 and up March 2006

Copyright © 2006, Nortel

Nortel Confidential

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Panasonic 15000 manual Red