Specifications

R4-11-4G Glossary 7
Local Area Network: (LAN) A privately owned and administered
network for data communications.Provides a relatively high bandwidth over
a limited geographical area for communication between the attached devices
(typically personal computers and servers).
Logical Identifier: (LID) A four-byte address used to uniquely identify a
mobile device in an RF network.
Logical Link Control: (LLC) The upper portion of the datalink layer, as
defined in IEEE 802.2. The LLC sublayer presents a uniform interface to the
user of the datalink service, usually the network layer.Beneath the LLC
sublayer is the media access control sublayer.
M
Management Information Base: (MIB) The name of the database used
to hold the management information relating to a network or internetwork.
Megabits per second: (Mb/s or Mbps) A unit of transmission rate,
equal to one million bits per second.
Megabyte: (MB) 1,048,576 bytes, often used to mean one million bytes.
MegaHertz: (MHz) A unit of frequency equal to one million cycles per
second (Hz).
millisecond: (ms) One thousandth of a second.
Mobile Data Terminal: (MDT) A computer type terminal that is
installed in car or truck and includes or connects to a radio modem which
allows the user to access information in the customer computer.
modulator-demodulator: (modem) A device providing an interface
between data processing equipment (such as a terminal, concentrator or
computer) and analog communications channels, applying the information
signal to the carrier wave (modulation) and recovering the original
information from the modulated carrier wave (demodulation).
N
Nickel Cadmium: (NiCd) A rechargeable battery chemistry.
Nickel-Metal Hydride: (NiMh) A rechargeable battery chemistry. NiMh
does not have memory and lasts longer than Nickel Cadmium.
nit: A unit of illuminative brightness equal to one candle per square meter
measured perpendicular to the rays of the source.