Technical data

146 Theoretical and general applications www.westermo.com
Glossary
10Base2 An Ethernet wiring standard that uses thin coaxial cable as the
network medium. A maximum of 185 metres (616 ft) is possible
per network segment. Devices can be connected directly onto
the LAN by daisy-chaining.
10Base5 An Ethernet wiring standard that uses thick, double shielded
coaxial cable as the network medium. A maximum of 500 metres
(1666 ft) is possible per network segment. A MAU is attached
into the cable to enable devices to communicate via an AUI port
located on the Ethernet device.
10BaseFL An Ethernet wiring standard that uses fibre optic cable as the
network medium. 10BaseFL runs at 10 Mbit/s.
10BaseT An Ethernet wiring standard that uses two twisted pairs of
copper wire as the network medium. A maximum distance of
100 metres (328 ft) is allowed between devices or to a network
hub or switch. An RJ-45 style connector is used as the connection
on Ethernet Devices. 10BaseT runs at 10 Mbit/s while 100BaseT
runs at 100 Mbit/s.
AC Alternating Current
Amplitude The transfer of information through varying the signal strength,
modulation amplitude, of the carrier wave.
ARP The Address Resolution Protocol is used to map IP addresses to
MAC addresses. As a TCP/IP tool, it’s used to add or delete MAC
or IP addressing information.
ARQ Automatic Repeat reQuest.
ASCII A code system for binary data code that defines 128 codes
with the help of different combinations of ones and zeros.
ASCII = American Standard Code for Information Interchange
Asynchronous Data is sent one character at a time with start and stop bits.
Approximately 90–95% of all serial data communications are
asynchronous.
Attenuation The data signals strength is reduced by the length of the cable
and the number of splices (fibre).
AUI The Attachment Unit Interface Port. A standard 15 Pin D-type
Ethernet cable used to connect between a network device and
an MAU.
B A C K