3Com CoreBuilder 9000 User Manual page 451

ASIC
ATM
ATM Interface
Module
ATM Layer Processor
backplane
carrier module
cell
Cell Loss Priority
(CLP)
chassis
CoreBuilder 9000
daughter card
G
LOSSARY
Application Specific Integrated Circuit, a chip designed for a particular
application. ASICs are built by connecting existing circuit building blocks
in new ways. Because the building blocks already exist in a library, it is
much easier to produce a new ASIC than to design a new chip from
scratch.
Asynchronous Transfer Mode. A transfer method used for LAN and
WAN. ATM carries voice, video, and data at speeds up to 2.2 Gbps and
can intergrate geographicaly distant disparate networks. Also called cell
relay.
An ATM Interface Carrier Module with one or two daughter cards.
The ATM Layer Processor prepares cell header information and manages
temporary cell storage.
The main bus that carries data within a device.
The ATM Interface Module without daughter cards.
An ATM Layer protocol data unit (PDU) characterized by fixed, rather
than variable, length payloads. The standard ATM cell is 48 bytes of
payload with 5 bytes of header.
A 1-bit field in the ATM cell header that corresponds to the loss priority
of a cell. Lower priority (CLP = 1) cells can be discarded under a
congestion situation.
The hardware housing unit for the CoreBuilder
A high performance modular switching family, which runs on an ATM
or Ethernet backplane.
Can be either OC-3, OC-12, single-mode or multi-mode or UTP5. These
cards are attached to the ATM Interface Carrier Module, to make the
Interface Module complete.
G 451
LOSSARY
®
9000.