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List of terms

hop count

The number of hops it takes for a packet to make it from a source to a destination, that is the number of nodes (routers) between a source and a destination. Each switch or router traversed by a packed is considered a hop.

horizontal link

A link between two logical nodes that belong to the same peer group.

host computer

The central controlling computer in a network of computers. It allows lower- level terminals to work through it to obtain access to other computers and their stores of information.

hot equipment protection (HEP)

A carrier grade feature that provides a customer with the capability of setting up a sparing configuration that allows for hitless switch-over capabilities.

hot standby

Hot standby applications and features offer hitless services during an FP or CP switchover. During an equipment switchover, hot standby applications incur minimal traffic interruption and established connections stay up.

hot swapping

Hot swapping of a data path refers to a service switchover while the node is in service.

HP

See holding priority (HP) (page 61).

HS

See half session (HS) (page 59).

HSM

See hitless software migration (HSM) (page 61).

HSSI

See high-speed serial interface (HSSI) (page 61).

HTDS

See HDLC-transparent data service (HTDS) (page 60).

hunt group (HG)

Hunt groups are a group of network addresses (DNAs) reachable from a unique DNA and configured so that an incoming call automatically searches for an available address in the group.

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 Hsm, Hssi, Htds