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List of terms
Nortel Multiservice Switch 7400/15000/20000
Terminology
NN10600-005 7.2S1 Standard
PCR7.2 and up March 2006
Copyright © 2006, Nortel Nortel Confidential
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
A third-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).