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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
data flow preservation
The process of maintaining uninterrupted data flow over a sequence of
potentially disruptive events. Connection preservation is implied whenever
data flow is preserved. Data flow preservation does not guarantee that data is
never discarded (for example, due to either congestion or error conditions).
See connection preservation (page 34).
data link control (DLC)
An interface that provides logical link control connection services.
data link switching (DLSw)
A forwarding protocol for wide area network support of the NetBIOS protocol.
data manipulation engine (DME)
The data manipulation engine (DME) is the base service that provides
capabilities for moving data frames to/from link interfaces and between
function processors within a Nortel Multiservice Switch node. It is designed to
provide protocol-based applications with the capability of performing
operations on data frames. Such operations are packet header manipulation,
packet retransmission, timing events, and queuing.
data network address (DNA)
A DNA is an identifier given to applications in many data networks. This
address is used as the fundamental identifier for setting up a virtual circuit
between data networks.
data packet network
A standards-based data networking system for interconnecting diverse host,
application, and end-user environments. The system gives organizations the
ability to choose the best solutions for data networking. DPN-100 addresses
the needs of organizations for reliable multi-protocol data services, such as
frame relay, SNA, and X.25, at speeds up to T1/E1. It supports a wide range
of physical interfaces including V.24, V.35, V.36, X.21, G.703, and token ring.
The highest possible availability, 99.999%, is achieved through networking
features, built-in redundancy, and a modular design.
data path object (DPO)
A data path object is a C++ object that processes frames at the interrupt level
on a Nortel Multiservice Switch card. A frame processes by passing through
a chain of DPOs; each DPO returns the ID of the next DPO in the chain. You
can configure a DPO to be addressable module-wide.