Asynchronous Serial Communications Programmer's Reference Manual (32022-90052)

Glossary 311
Glossary
X.25 iX System Access software
resides on an HP 3000 host and is
configured through use of
NMMGR. The DTC/X.25 Network
Access software resides on the
Datacommunications and
Terminal Controller and is
configured at the OpenView
Windows Workstation for
PC-based management and
through NMMGR for host-based
management.
DTE Data Terminal Equipment.
Equipment that converts user
information into
data-transmission signals or
reconverts received data signals
into user information. Data
terminal equipment operates in
conjunction with data
circuit-terminating equipment.
DTS Distributed Terminal
Subsystem. This consists of all of
the Datacommunications and
Terminal Controllers (DTCs) on a
LAN, their LANIC cards
(attached to the host), the LAN
cable, and the host and DTC
software that controls all related
DTS hardware.
duplex A transmission method
that allows two way
communication. If both ends of
the transmission link can
transmit simultaneously, it is
called full duplex. If only one end
can transmit at a time, it is half
duplex transmission.
E
entry priority In a
point-to-point network, it is a
ranking that identifies the most
desirable route for data to travel
from a given local node to a
remote node.
environment A session that is
established on a remote node.
escape from data transfer
character A character that
allows a user who is connected to
a host system through the DTC,
to break that connection and
return to the DTC switching user
interface. The default is
[CTRL]-K. This character is used
only on networks managed by the
OpenView Windows Workstation.
escape sequence A sequence of
characters beginning with the
escape character and followed by
one or more other characters,
used to convey control directives
to printers, plotters, or terminals.
Ethernet A Local Area Network
system that uses baseband
transmission at 10 Mbps over
coaxial cable and unshielded
twisted pair. Ethernet is a
trademark of Xerox Corporation.
event log One of three circular
files stored on the OpenView
windows workstation. It contains
lists of events that are reported
by the DTCs for which it is
responsible.