Troubleshooting Terminal, Printer and Serial Device Connections - Edition 4 (32022-90030)
Glossary 143
Glossary
to establish a virtual circuit (SVC
or PVC) through an X.25
network.
ldev See logical device
number.
leased line A data-grade
telephone line leased directly to a
subscriber and allocated
specifically for the subscriber’s
needs.
line speed The speed at which
data is transferred over a specific
physical link (usually measured
in bits or kilobits per second).
link name A name that
represents a hardware interface
card. The link name can contain
as many as eight characters. All
characters except the first can be
alphanumeric; the first character
must be alphabetic.
Local Area Network Interface
Controller (LANIC) A
hardware card that fits into the
backplane of the HP 3000
Series 900 computer and provides
a physical layer interface for
IEEE 802.3 local area networks.
local connection See direct
connection.
local node The computer that
you are configuring or that you
are logged on to.
local switching A feature of the
DTC which permits back-to-back
configuration (for connections to
an HP 3000 MPE/V host), using
two ports of the same DTC.
logging The process of recording
the usage of network resources.
Events can be logged to both the
OpenView workstation and to the
MPE/iX host.
logging class A number
defining the severity of any given
event logged. An operator uses
the logging classes to specify
which events are to be logged.
Class 1 (catastrophic event) is
always logged.
logical device number (ldev)
A value by which MPE/iX
recognizes a specific device. All
DTC devices that are configured
as nailed devices through the
NMMGR configuration have ldev
numbers permanently assigned.
The DTC devices can then be
accessed programmatically
through use of their ldev number.
Non-nailed devices have ldev
numbers that are assigned from a
pool of available ldev numbers for
the life of their connection to a
system. Each nailed port
configured in NMMGR must have
a unique ldev number.
log off The termination of a job
or session. unique ldev number.
log on The process of initiating a
job or session.
logon device See
session-accepting device.
loopback The routing of
messages from a node back to
itself.