Carrier Access Multi-Service Router (MSR) Card MSR/Adit 3K GUI - Manual (Page 253)

Adit 3000 (Rel. 1.6) and MSR Card (Rel 2.0) GUI Glossary-9
Glossary
Local Area Network
(LAN) A short distance data communications network (typically within a building or campus)
used to link together computers and peripheral devices under some form of standard
control.
Line Build Out (LBO) T1s require the last span to lose 15 - 22.5 dB, a selectable output attenuation is generally
required of DTE equipment.
Line Coding Violation
(LCV) This parameter is a count of both BPVs and EXZs occurring over the accumulation period.
An EXZ increments the LCV by one regardless of the length of the zero string.
Line Errored Seconds
(LES) A Line Errored Second is a second in which one or more CVs occurred OR one or more
LOS defects.
Local Link Control
(LLC) A protocol developed by the IEEE 802.2 committee for data-link-level transmission control
Local Management
Interface A specification for the use of frame-relay products that define a method of exchanging
status information between devices such as routers
loop start (LS) A method of demanding dial tone from the central office by completing an electrical
pathway between the outbound and return conductors of a telephone line. Loop start is
employed by single-line telephone instruments, for example
loopback A diagnostic test in which a signal is transmitted across a medium while the sending device
waits for its return.
MAC Address The address for a device as it is identified at the Media Access Control layer in the network
architecture
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
mapping In network operations, the logical association of one set of values, such as addresses on one
network, with quantities or values of another set, such as devices on another network.
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.
Media Gateway Control
Protocol (MGCP) MGCP. A control and signal standard for the conversion of audio signals carried on
telephone circuits (PSTN) to data packets carried over the Internet or other packet
networks.
Microsoft CHAP Microsoft Challenge Handshake Authentication Protocol (MS-CHAP) is the Microsoft
version of CHAP and is an extension to RFC 1994. Like the standard version of CHAP,
MS-CHAP is used for PPP authentication; in this case, authentication occurs between a PC
using Microsoft Windows NT or Microsoft Windows 95 and a Cisco router or access server
acting as a network access server (NAS).