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List of terms

SPT

See shortest path tree (SPT) (page 121).

spare card

A spare processor card is either

an installed back-up card that has been configured (provisioned) in software to take over the traffic and services of a compatible or equivalent card when that card is removed from service manually or by the system; in the Nortel Multiservice Switch suite of NTPs, occurrences of “spare card” almost always refer to this definition

an unused card that is stored as a replacement card in the event of a failure, upgrade, or redeployment of a compatible or equivalent card

See also sparing (page 125) and sparing panel (page 125).

sparing

Using a spare card to enable redundant back-up of another card’s active traffic, services, and capabilities. The effectiveness of the sparing depends on choosing a compatible or equivalent card. A compatible card usually has the same root product engineering code (PEC) and provides the same services and capabilities but with different rates of performance. An equivalent card can have a different PEC but provides the same or very similar services and capabilities.

sparing panel

A termination panel that enables the sparing of one or more function processors (FPs) by a single FP of the same type and compatible or equivalent vintage. See also sparing timer (page 125), sparing (page 125), and equipment sparing (page 48).

sparing timer

This timer is used to cause a switchover if a failed main function processor (FP) in a one-for-n sparing configuration has not recovered by the time it expires. This timer is five minutes. See also stability timer (page 127).

SPD

See security policy database (SPD) (page 119).

SPE

See SONET payload envelope (SPE) (page 124).

specified path

A manually pre-determined path that consists of a series of transit nodes.

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 Spt, Spd, Spe