EDFA
See “erbium-doped fiber amplifier” (p. GL-9) for definition.
edge node
A node that connects to external network or customer equipment, as opposed to providing an
interconnection point between other nodes. It is located at the "edge" of the network.
egress
Traffic leaving a network
EIA
See “Electronic Industries Alliance” (p. GL-8) for definition.
electrical variable optical attentuator (eVOA)
Works with the Tap module to provide input for Wavelength Tracker modulation and provides
optical tap for feedback signal to the Wavelength Tracker.
electromagnetic capability (EMC)
EMC is the ability of a device or system to function without error in its intended electromagnetic
environment
electromagnetic interference (EMI)
EMI refers to the emissions (high-energy, electrically induced magnetic fields) from a device or
system that interfere with the normal operation of another device or system.
Electronic Industries Alliance (EIA)
Group that specifies electrical transmission standards. The EIA and TIA have developed
numerous well-known communications standards, including EIA/TIA-232 and EIA/TIA-449.
electrostatic discharge (ESD)
Static electrical energy potentially harmful to circuit packs and humans.
Element Management System (EMS)
The EMS provides an efficient means of managing the equipment and services within a network,
including creating new services, diagnosing faults, and planning for growth. It includes interfaces
to external systems to allow functions such as billing, service orders, and service level agreement
(SLA) management.
EMC
See “electromagnetic capability” (p. GL-8) for definition.
EMI
See “electromagnetic interference” (p. GL-8) for definition.
EMS
See “Element Management System” (p. GL-8) for definition.
EN
European Norm; a German acronym that stands for “Europaïsche Norm.”
Glossary
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GL-8
1830 PSS-36/PSS–32/PSS-16/PSS-4
8DG60888CAAA Release 3.6.0 and 3.6.1
Issue 1 June 2011
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