Carrier Access Network Device Axxius 800 - Manual (Page 545)

Axxius 800 - Release 2.2 Glossary - 13
Glossary
LULT
LULT Line Unit Line Termination
LUNT Line Unit Network Termination
Management
Information
Base (MIB) A data base of objects, with attributes and values, representing the
manageable components of a network device. Used in SNMP. There are
industry standardized MIBs and proprietary MIBs
Media Access
Control (MAC) The lower of the two sub-layers of the data link layer defined by the
IEEE. The MAC sub-layer handles access to shared media, such as
whether token passing or contention will be used. The MAC contains the
standardized data link layer address that is required for every port or
device that connects to a LAN. Other devices in the network use these
addresses to locate specific ports in the network and to create and update
routing tables and data structures. MAC addresses are 6 bytes long and
are controlled by the IEEE.
Mean Time
Between
Failures
(MTBF) This was an effort to establish a figure that gives an estimate of the
reliability of a piece of equipment. The higher the MTBF rating, the
longer the equipment should last.
megabyte (MB) A measurement of storage capacity equal to approximately 1 million
bytes (1,048,576 bytes).
modem MOdulator-DEModulator, a device that takes digital computer signal,
converts it to analog, and sends it across the phone line. Another modem
on the reverse does the exact opposite action. Modems transfer data at
different speeds or rates, called baud.
multiplexor A complex piece of telephone equipment which combines the data
stream of several leased lines for transmission over a single higher
bandwidth leased line. Multiplexors are used in the construction of
WANs.
network A set of computers linked to one another for data sharing, or the link
itself.