Cyan Z-Series Engineering and Planning Guide Release 5.0
Page 210 © 2013 Cyan, Inc. Proprietary Information 700-0023-05-00 Rev. 1
L-AMP
Lambda Amplifier — The Cyan Z-Series L-AMP is a self-contained 1 RU module that functions
as a bi-directional mid-span optical amplifier / repeater. Each 4-port Cyan L-AMP supports
bi-directional physical layer amplification of multiple DWDM wavelengths where node-to-node
spans are greater than 80 kilometers.
LAN Local Area Network
LBM
Loopback Message –
A Loopback Message is used to verify bidirectional connectivity between
the two maintenance entities. A MEP may send one or more LBMs to a specific Maintenance
Point (MEP or MIP).
LBR
Loopback Response — When an LBM is received by a remote MEP/MIP that matches its
address, an LBR is generated. The LBR returns the information, if any, that was transmitted in
the LBM.
LGX Light-Guide Cross-connects
Link Links represent a connection between two nodes.
LM Loss Measurement
LME
Lambda Multiplexer Element — The Cyan Z-Series 2.5G-LME4 is a 4-port muxponder
(multiplex-transponder) module with integrated OTN encoding for efficient 10G wavelength
transport in the Cyan Z-Series multi-layer transport platforms. Each module accepts any
combination of up to four 2.5G OC-48, STM-16 and/or OTU-1 signals which are
encoded/translated into discrete ODU-1 layers and then multiplexed into a 10G OTU2
wavelength for managed DWDM transport.
LOS Loss of Signal
LSA Link State Announcements
LTM
Link Trace Message — LTMs are multicast frames that a MEP transmits to follow the path
(hop-by-hop) to the target MEP.
LTR Link Trace Reply
MA Maintenance Association
MAC
The Media Access Control address is a unique hardware number that is assigned to each
Ethernet device by the manufacturer.
MAU 802.3 Medium Attachment Unit
Mbps Megabits per second
MD Maintenance Domain
ME Metro Ethernet
MEF Metro Ethernet Forum
MEN Metro Ethernet Network
MEP Maintenance End Point
MEPs are edge nodes where flows originate and terminate.
MIB Management Information Base
The MIB contains managed objects that the user can access through a network communication
protocol such as SNMP.
MIP Maintenance Intermediate Points
MS Multiplex Section
MSE
Multiservice SONET/SDH Element — The Cyan Z-Series Multiservice SONET/SDH Element
(MSE-1482) is an advanced SONET/SDH aggregation and transport module, with integrated
OTN transport supporting both the Cyan Z-Series multi-layer transport platforms. The
MSE-1482 module provides a full 10G transport of SONET, SDH and Ethernet services with
non-blocking STS cross-connect for aggregation and grooming (including hair-pin capability)
across a wide range of SFP/XFP pluggable interfaces.
MSPP Multi-Service Provisioning Platform
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