Switch User's Manual

58 P
peak cell rate (PCR)
The upper limit on the time interval between two
consecutive ATM cell emissions.
penultimate router
Penultimate means next-to-last. In this case, it
refers to the next-to-last provider router in the
network.
per-hop behavior (PHB)
A traffic class forwarding treatment based on
criteria defined in the DiffServ field.
permanent virtual connection (PVC)
An ATM channel connection or path connection
configured at the network management interface.
Personal Computer Memory Card International
Association (PCMCIA)
A standard software and hardware interface that
accommodates credit-card-sized hardware cards
into a personal computer.
physical layer (PHY)
Layer 1 of the Open System Interconnection
(OSI) model that provides raw information
channels to Layer 2. Protocols depend on
whether the interface is the basic rate inteface
(BRI) or primary rate interface (PRI).
Port Interface Module (PIM)
A Field Programmable Gate Array (FPGA)
device on the R module.
point of presence (PoP)
A physical layer within a local access and
transport area (LATA) at which an interLATA
carrier establishes itself to obtain LATA access,
and to which the local exchange carrier provides
access services.
Nortel Ethernet Routing Switch 8600
Terminology
NN46205-102 01.01 Standard
30 May 2008
Copyright © 2008 Nortel Networks
.