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List of terms

UBR with MDCR

See unspecified bit rate (UBR) with minimum desired cell rate (MDCR) (page 138).

UDP

See user datagram protocol (UDP) (page 139).

UMTS

See Universal Mobile Telecommunications System (page 138).

UNI

See user-to-network interface (UNI) (page 139).

UNI scope

The membership scope associated with group addresses.

unicast forwarding

A packet forwarding mode that delivers the packet to a single destination (egress node).

Universal Mobile Telecommunications System

Athird-generation, CDMA-based, wireless system designed for interoperability with existing TDMA-based GSM/GPRS networks. UMTS standardizes low-power, short-distance radio transmissions, such as cellular, cordless, low-end wireless, local area network, private mobile radio and paging systems.

universal trunk protocol (UTP)

The specific protocol between Nortel Multiservice Switch and DPN devices through an acknowledged trunking system.

unspecified bit rate (UBR)

A service category that defines connection throughput as best-effort, in which cells are either forwarded if link bandwidth is available or discarded if bandwidth is not available. UBR traffic has low emission and high discard eligibility. This QOS is used for non real-time applications.

unspecified bit rate (UBR) with minimum desired cell rate (MDCR)

A standards-based type of UBR service category in which a preference for minimum bandwidth objective is indicated to the network, without defining any quality of service (QOS) commitment.

UPC

See usage parameter control (UPC) (page 139).

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 Udp, Umts, Uni, Upc