ForeRunner
ATM Switch Network Configuration Manual
Glossary - 13
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Glossary
End System (ES) -
a system where an ATM connection is terminated or initiated (an originat-
ing end system initiates the connection; a terminating end system terminates the connection).
End System Identifier (ESI) -
This identifier distinguishes multiple nodes at the same level in
case the lower level peer group is partitioned.
End-to-End Connection -
when used in reference to an ATM network, a connection that travels
through an ATM network, passing through various ATM devices and with endpoints at the
termination of the ATM network.
Enterprise -
Terminology generally referring to customers with multiple, non-contiguous geo-
graphic locations.
Equalization (EQL) -
the process of compensating for line distortions.
Erasable Programmable Read Only Memory (EPROM) -
A PROM which may be erased and
rewritten to perform new or different functions (normally done with a PROM burner).
Errored Second (ES) -
a second during which at least one code violation occurred.
Ethernet -
a 10-Mbps, coaxial standard for LANs in which all nodes connect to the cable where
they contend for access.
Excessive Zeroes (EXZ) Error Event -
An Excessive Zeroes error event for an AMI-coded signal
is the occurrence of more than fifteen contiguous zeroes. For a B8ZS coded signal, the defect
occurs when more than seven contiguous zeroes are detected.
Explicit Forward Congestion Indication (EFCI) -
the second bit of the payload type field in the
header of an ATM cell, the EFCI bit indicates network congestion to receiving hosts. On a con-
gested switch, the EFCI bit is set to “1” by the transmitting network module when a certain
number of cells have accumulated in the network module's shared memory buffer. When a
cell is received that has its EFCI bit set to “1,” the receiving host notifies the sending host,
which should then reduce its transmission rate.
Explicit Rate (ER) -
The Explicit Rate is an RM-cell field used to limit the source ACR to a spe-
cific value. It is initially set by the source to a requested rate (such as PCR). It may be subse-
quently reduced by any network element in the path to a value that the element can sustain.
ER is formatted as a rate.
Extended Industry Standard Architecture (EISA) -
bus architecture for desktop computers that
provides a 32-bit data passage and maintains compatibility with the ISA or AT architecture.
Extended Super Frame (ESF) -
a T1 framing format that utilizes the 193rd bit as a framing bit,
but whose Superframe is made up of 24 frames instead of 12 as in D4 format. ESF also pro-
vides CRC error detection and maintenance data link functions.
Exterior Gateway Protocol (EGP) -
used by gateways in an internet, connecting autonomous
networks.
Fairness -
related to Generic Flow Control, fairness is defined as meeting all of the agreed
quality of service requirements by controlling the order of service for all active connections.
Summary of Contents for forerunner series
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Page 16: ...TOC 10 ForeRunner ATM Switch Network Configuration Manual Table of Contents ...
Page 20: ...LOF 4 ForeRunner ATM Switch Network Configuration Manual List of Figures ...
Page 22: ...LOT 2 ForeRunner ATM Switch Network Configuration Manual List of Tables ...
Page 30: ...viii ForeRunner ATM Switch Network Configuration Manual Preface ...
Page 144: ...3 58 ForeRunner ATM Switch Network Configuration Manual Configuring an Emulated LAN ...
Page 180: ...6 12 ForeRunner ATM Switch Network Configuration Manual ATM Forum PNNI ...
Page 220: ...9 6 ForeRunner ATM Switch Network Configuration Manual Configuring Timing ...
Page 300: ...D 24 ForeRunner ATM Switch Network Configuration Manual Configuring FramePlus Modules ...
Page 308: ...Acronyms 8 ForeRunner ATM Switch Network Configuration Manual Acronyms ...
Page 346: ...Glossary 38 ForeRunner ATM Switch Network Configuration Manual Glossary ...
Page 352: ...Index 6 ForeRunner ATM Switch Network Configuration Manual Index ...