Configuring Systems for Terminals, Printers, and Other Serial Devices (32022-90057)

Glossary
DTE
Glossary
252252
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 Datacommunications and 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.
DTS restart The startup of the DTS subsystem
using the DTCCNTRL command file after DTS has
been shut down.
DTS shutdown The shutdown of the DTS
subsystem, including the release of all TIO-related
resources, using the DTCCNTRL command file.
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.
dynamic configuration The ability to make DTS
configuration changes using NMMGR without
rebooting the HP e3000 system.
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.
extended packet sequence numbering One of
the optional Network Subscribed Facilities that
provides packet sequence numbering using modulo
128. If not subscribed, modulo 8 is used.
F
facility An optional service offered by a packet
switching network's administration and requested
by the user either at the time of subscription for
network access or at the time a call is made. Also
known as user facility.
facility set A facility set defines the various X.25
connection parameters and X.25 facilities that can
be negotiated for each virtual circuit on a per-call
basis.
fast select An optional packet-switching network
facility by which user data can be transmitted as
part of the control packets that establish and clear a
virtual connection.
FCS Frame Check Sequence. A sequence of bits
generated by X.25 at Level 2 that forms part of the
frame and guarantees the integrity of its frame’s
contents. The FCS is also used by the IEEE 802.3
protocol to check the validity of frames.
file equation An assignment statement used to
associate a file with a specific device or type of device
during execution of a program.
file number A unique number associated with a file
when the file is opened. The file number is returned
in the FOPEN or HPFOPEN call used to open the
file. It can be used to access that file until the file is
closed.