Alcatel-Lucent 1643 AMS Operation Manual page 361

Glossary
LH
Long Haul
License key
An encrypted code that is required to enable the use of specific modules in the ITM-SC.
Valid license keys can be obtained from your provider.
Line
Transmission line; refers to a transmission medium, together with the associated high
speed equipment, that are required transport information between two consecutive
network elements, one of which originates the line signal and the other terminates the
line signal.
Line Build Out (LBO)
An optical attenuator that guarantees the proper signal level and shape at the receiver
input.
Line Overhead Controller (LOC)
SLM circuit pack that accesses the overhead bytes from the high speed line.
Line Termination Unit (LTU)
The system that contains the STU-C function.
Link Capacity Adjustment Scheme (LCAS)
The Link Capacity Adjustment Scheme is a protocol that allows to dynamically change
the number of payload carrying VC-n's in a Virtual Concatenation Group (VCG). Under
management control a VC-n can in-service be added to or deleted from a VCG.
Furthermore, VC-n's for which a Trail Signal Fail (TSF) condition is present can be
removed autonomously from the VCG and added to the group again as soon as the TSF
condition is no longer present.
LO
Low Order
LOF
Loss Of Frame
LOM
Loss Of Multiframe
Loop Timing
A timing mode in which the terminal derives its transmit timing from the received line
signal.
LOP
Loss of pointer
LOS
Loss of signal
LOSW
Loss of sync word
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365-312-803R7.2
Issue 4, May 2007
Alcatel-Lucent - Proprietary
See notice on first page
GL-15