
A.11 J
Jitter
Short waveform variations caused by vibration, voltage fluctuations, and control system
instability.
jitter tolerance
Jitter tolerance is defined as the peak-to-peak amplitude of sinusoidal jitter applied on
the input ATM-PON signal that causes a 1 dB optical power penalty at the optical
equipment.
A.12 L
Label
A short identifier that is of fixed length and local significance. It is used to uniquely
identify the FEC to which a packet belongs. It does not contain topology information. It
is carried in the header of a packet and does not contain topology information.
LACP
Link Aggregation Control Protocol
LAG
LAN
Local Area Network
LAPS
Link Access Procedure-SDH
Laser
A component that generates directional optical waves of narrow wavelengths. The laser
light has better coherence than ordinary light. The fiber system takes the semi-conductor
laser as the light source.
Layer
A concept used to allow the transport network functionality to be described hierarchically
as successive levels; each layer being solely concerned with the generation and transfer
of its characteristic information.
layer 2 switch
A data forwarding method. In a LAN, a network bridge or 802.3 Ethernet switch
transmits and distributes packet data based on the MAC address. Since the MAC address
is at the second layer of the OSI model, this data forwarding method is called Layer 2
switch.
LB
LBM
Loopback Message
LBR
Loopback Reply
LC
Lucent Connector
LCAS
Link Capacity Adjustment Scheme
LCD
Liquid Crystal Display
LCT
Local Craft Terminal
License
A permission that the vendor provides for the user with a specific function, capacity, and
duration of a product. A license can be a file or a serial number. Usually the license
consists of encrypted codes. The operation authority granted varies with the level of the
license.
Link
In the topology view, a link is used to identify the physical or logical connection between
two topological nodes. A link is used to connect signaling points (SPs) and signaling
transfer points (STPs) and transmit signaling messages.
OptiX OSN 550 Multi-Service CPE Optical Transmission
System
Configuration Guide
A Glossary and Acronyms
Issue 02 (2011-06-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
A-17