Troubleshooting Terminal, Printer, and Serial Device Connections - Edition 5 (32022-90058)

Glossary
map, network
Glossary
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LANIC physical path The physical location (slot
number) of the LANIC within the SPU.
LANIC Self-Test A ROM-based program on a
LANIC card that tests and reports the status of the
LANIC hardware.
LAP Link Access Protocol. The data link protocol
specified by older versions (prior to 1980) of X.25 at
Level 2 but still permitted and therefore usable. All
new implementations of X.25 must use LAP-B, and
all old implementations must migrate to LAP-B at a
future date.
LAP-B Link Access Protocol -Balanced. The data
link protocol specified by the 1980 version of X.25 at
Level 2 that determines the frame exchange
procedures. LAP-B must also be used over
direct-connect NS Point-to-Point 3000/iX Links.
LCI Logical Channel Identifier. Local value on a
network node which identifies the channel used 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 IE E E802.3
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.
LUG Local User Group. A list defined for a
particular DTC and card that specifies which remote
nodes this DTC can send data to and also which
remote nodes this DTC can receive data from. See
also Closed User Group.
M
map, network A drawing that shows the topology
of the network. For networks managed by the
OpenView DTC Manager a network map must be
created through use of the OVDraw capability
provided with the management software. A network
map is also a hardcopy drawing used when planning
a network. It shows network topology, node and
network names, addresses, network boundaries (for
an internetwork map), and link types.