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List of terms
high-level data link control (HDLC)
An
high-speed serial interface (HSSI)
An
hitless CP switchover
The switch of activity from the active CP to a standby CP without restarting the FPs on the shelf. FPs that support hitless CP switchover continue, uninterrupted, to provide service. FPs that do not support hitless CP switchover must restart and do not provide uninterrupted service.
hitless services
1A service is hitless when the software that provides the service can run uninterrupted, even when the hardware providing the service changes. With hitless services, traffic incurs minimal interruption and established connections stay up. Nortel Multiservice Switch software applications and features are categorized based on their ability to provide hitless services.
2See cold standby (page 30).
3See hot standby (page 62).
4See warm standby (page 148).
hitless software migration (HSM)
Hitless software migration allows a shelf (CPs and FPs) to migrate from one version of software to another without interrupting the services being provided by that shelf.
holding priority (HP)
In an ATM network, a priority scheme that is assigned to all bandwidth non- elastic ATM connections to indicate the relative importance of each connection. When a loss of bandwidth occurs, connections with lower holding priority are released first.
In a PORS network, a parameter that indicates the tolerance of a connection for path bumping. A connection with a lower holding priority can be bumped to an alternative path or terminated by a connection with a higher priority.
hop by hop route
A routing approach in which each node along the path uses its own routing knowledge to determine the next hop of the route. The expectation is that all nodes choose consistent hops so that the call reaches the requested destination.
Nortel Multiservice Switch 7400/15000/20000
Terminology
PCR7.2 and up March 2006
Copyright © 2006, Nortel | Nortel Confidential |
