Technical data

www.westermo.com Theoretical and general applications 149
Data bits See bit.
Databus Several parallel cables for the transfer of data internally in equip-
ment.
Datagram A self-contained sequence of data that carries sufficient informa-
tion so that it can be routed from source to destination without
any other or earlier type of interaction between these two
devices.This type of connection is commonly referred to as con-
nectionless based communication.
DC Direct Current.
DCE Data Communication Equipment.
DDS1 European standard for ISDN connections.
Dedicated line Privately own communication cable.
DHCP The Dynamic Host Configuration Protocol enables devices to
request and then be assigned IP addresses from a DHCP Server
located on the LAN. If a DHCP server is not available IP address-
es have to be statically fixed into the configuration of the
Ethernet Device.
Dial-up network Another way of referring to the public-switched telephone net-
work (PSTN).
DIN rail Deutsche Industri Norme, standard for mounting equipment in
cubicles.
DTE Data Terminal Equipment.
Duplex Defines communication in both directions. In half duplex the par-
ties take turns to send and receive, in full duplex it occurs simulta-
neously.
EMC Electro Magnetic Compatibility, design of products so that they do
not interfere with other electronic equipment.
EMI Electro Magnetic Interference.
Ethernet Is one of the common standards for LAN-bus networks within
office applications and can be built with both coaxial cable and
special 4-wire cable.
Euro-ISDN Realization of ISDN based on European standards.
Fading The signals are weakened or attenuated with the transfer distance
(cable, air, etc)
B A C K