ICP DAS USA MSM-508 User Manual page 9

Industrial Ethernet Layer 2 Managed Switch User Manual
capabilities, and the logic and timing necessary to provide a standard
EIA/TIA or CCITT interface. Converts signals between those used at
the DTE's serial interface and bipolar signals used on the digital
network. Also Network Terminal Unit (NTU).
DTE Acronym for Data Terminating or Data Terminal Equipment.
DTR Acronym for Data Terminal Ready.
E1 The European standard for high speed, point to point transmission
operating at 2.048 Mbps and defines 64 Kbps sub-channels.
EIA Acronym for Electronic Industries Association. EIA, a standards body,
has a set of standards which includes data communications and
interface standards among others.
EMI Acronym for Electro-Magnetic Interference.
FEP Stands for Front End Processor. It is an IBM communication controller
that routes traffic to and from cluster controllers.
FDDI Acronym for Fiber Distributed Data Interface, is a shared medium, ring
topology LAN that operates at 100 Mbps. It is ANSI standard X3T9.5,
using fiber optic cable as the medium.
FPGA Acronym for Field Programmable Gate Array.
LAN A local area network is a group of PCs connected over a common
medium within a building.
MAC Acronym for Medium Access Control. A designated hardware address
for each device on a LAN or MAN. This address is burnt into The
network interface card (NIC) by its manufacturer.
MAN A metropolitan area network is a group of PCs connected over a
common medium within a campus environment or the same city.
NA Acronym for Numerical Aperture.
OC1 Optical Carrier Signal Level 1 refers to SONET data transmission at
51.840Mbps.
OC3 Acronym for Optical Carrier 3, a transmission rate standard for fiber
optic telephony or data communications circuits. OC3 operates at 155
Mbps speed and is part of the SONET hierarchy.
OC12 Optical Carrier Signal Level 12 refers to SONET data transmission at
622.080Mbps.
OSI (Open Data Interconnection Reference Model) - This is the
International Standards Organization (ISO) model of how data
communications systems can be interconnected. Communication is
partitioned into seven function layers. Each layer builds on the
services provided by those under it.
PBX Acronym for Private Branch Exchange, is a small private version of a
phone company's larger central switching office.
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