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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
P
See “provider nodes (P)” (page 107).
P-node
See “provider nodes (P)” (page 107).
P’
Provider node within the Carrier’s Carrier domain.
PA
See path administrator (PA) (page 97).
PABX
See private branch exchange (PBX) (page 105).
packet
Packet is a term that can be used interchangeably with frame to mean a
variable-length data unit.
The term frame means a generic variable-length data unit. Packets are
generally used in layer 3 and frames in layer 2.
packet delay variation (PDV)
The measurable variation in the interval between AAL2 packets arriving at a
network element. The accumulation of this variation results in packet
clumping.
packet delay variation tolerance (PDVT)
PDVT defines the tolerance to AAL2 packet clumping that results from the
accumulating amount of packet delay variation or “jitter” in the network or
customer premises equipment (CPE).
packet forwarding
A term used to describe the process of moving packets from node to node on
the network. See also
unicast forwarding (page 138) and multicast forwarding
(page 83).
packet forwarding table
Information relating to network topology that is used to route packets to paths
that are appropriate to their requirements. For example, packet headers
specify the destination and the priority of the packet. This is checked against
the packet forwarding tables, which contain information about the network.
The packet is then sent along the path that best fits its requirements.