Carrier Access Network Device Axxius 800 - Manual (Page 544)

Glossary - 12 Axxius 800 - Release 2.2
Glossary
Line Coding Violation (LCV)
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.
Line Interface
Unit (LIU) Typically, a controller device in a D-type channel bank, that incorporates
a controller, channel service unit (CSU), ringing generator and power
converter on a single card to interface between the T1 network and the
analog functions of the channel bank.
LLC Logical Link Control. A protocol developed by the IEEE 802.2
committee for data-link-level transmission control
LMI 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.
LMU Line Monitor Unit.
LOF Loss of Frame.
LOS Los of Signal.
loop back test Any test in which a test signal is injected at one end of a circuit, is looped
back at the other end, and monitored at the originating end.
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.