Cyan Z-Series Engineering and Planning Guide Release 5.0
Page 208 © 2013 Cyan, Inc. Proprietary Information 700-0023-05-00 Rev. 1
ELMI Ethernet Link Management Interface
EMS Element Management System
E-LAN An Ethernet service type that is based on a multipoint-to-multipoint EVC.
E-Line
An Ethernet service type based on a point-to-
point Ethernet Virtual Connection. EPL and EVPL
are E-Line services. E-Line supports Class of Service (CoS) and VLAN tagging.
E-NNI External Network-to-Network Interface
EoS Ethernet over SONET/SDH
EPL
Ethernet Private Line — EPL provides a point-to-point Ethernet connection between a pair of
dedicated User-Network Interfaces (UNIs). EPL service is specified using an E-Line service
type. EPL is implemented as a point-to-point EVC.
ERP
Ethernet Ring Protection — As specified in ITU-T G.8032, ERP provides E-LAN and E-VLAN
service protection for ring configurations through the protocol protection switching mechanisms
for Ethernet rings.
ESMC
Ethernet Synchronization Messaging Channel — The ESMC, provided by a SyncE-
Cyan Z-Series PME-412 or PME-
216i 10G port, supplies the clock quality level value from node
to node. It sends and receives Synchronization Status Messages (SSM) to maintain the timing
synchronization chain and allow external equipment to retrieve Line timing from the PME 10G
port.
ESP
Ethernet Switched Path — ESP is a provisioned traffic-engineered unidirectional connectivity
path between two or more subscriber backbone ports that extends over a Provider Backbone
Bridge Network.
EtherType A field in the Ethernet frame that indicates which protocol is encapsulated in the payload.
ETYn ITU-T Ethernet Physical Section Layer of order n:
• n=1 (10Base)
• n=2 (100Base)
• n=3 (1000Base)
• n=4 (10GBase)
• n=5 (100GBase)
EVPL
Ethernet Virtual Private Line — EVPL is another E-Line service that provides a point-to-point
Ethernet connection between two Ethernet UNIs. EVPL allows a single physical connection
(UNI) to customer premises equipment for multiple virtual connections.
EVC
Ethernet Virtual Connection — An association of two or more UNIs that limits the exchange of
frames to UNIs in the Ethernet Virtual Connection.
FCAPS Fault, Configuration, Administration, Performance, and Security
FCAPS is the ISO Telecommunications Management Network model for network management.
FCS Frame Check Sequence
FD
Flow Domain — Represents a connectionless sub-network and is defined by a set of Flow
Points that are available for the purpose of transferring information. An Ethernet Flow Domain
represents a logical Ethernet Bridge with Flow Points representing logical ports on the bridge.
FDI Forward Defect Indication
FEC Forward Error Correction
FIB
Forwarding Information Base — Also referred to as Forwarding Table, it provides optimized
information of destination addresses in network bridging and routing.
FLX
The Cyan Z-Series FLX-216i is a flexible multi-rate OTN muxponder I-Temp module. The
FLX-
216i module is a highly scalable OTN switching and muxponder optimized for deployments
in network transport applications. The environmentally hardened FLX-216i module provides
end-to-end packet and TDM/OTN transport.
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