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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
ATM IP function processor
Nortel Multiservice Switch ATM node function processor that uses the
Multiservice Switch queue controller (PQC) and ATM queue manager (AQM)
ASICs to provide enhanced cell processing and ATM traffic management
capabilities.
ATM layer
A layer in the B-ISDN protocol stack that transfers ATM cells. It is positioned
between the physical layer and the AAL.
ATM link
A standards-based ATM connection.
ATM logical multicasting
Logical multicasting creates additional VCCs on the same output port of a
node, thus allowing more than one replicated copy of the same cell to be
delivered to the same output port. This in turn enables cell replication for
transport over ATM networks that do not support multicasting.
ATM multiprotocol encapsulation service
A service that supports two encapsulation methods for carrying
connectionless network interconnect traffic over AAL-5. The first method is
logical link control (LLC) encapsulation, which permits multiple protocols over
a single ATM virtual circuit (VC). The second method is VC encapsulation,
which permits one protocol over each ATM VC.
ATM network multicasting
Network multicasting is performed at each node in the ATM network to
determine where branch points for a PMP call are required. Once a branch
point is identified, spatial multicasting techniques are utilized to replicate the
cell stream.
ATM networking
Encompasses the standards-based UNI, IISP, AINI, and PNNI routing and
signaling protocols.
ATM queue manager (AQM)
A hardware chip on ATM IP function processors. The AQM performs traffic
management functions such as per-VC queuing, shaped fair queuing, and
processing for available bit rate (ABR) traffic.
ATM spatial multicasting
Spatial multicasting delivers replicated cells to different output ports on the
same node, thus permitting the routing of cells from the same node to different
destinations.