Alcatel-Lucent 1643 AMS Applications And Planning Manual page 311

Glossary
SAI
Station Alarm Interface
SC
Square coupled Connector
SD
Signal Degrade
SDH
Synchronous Digital Hierarchy. Definition of the degree of control of the various clocks
in a digital network over other clocks.
SDH-TE
SDH - Terminal Equipment
SEC
SDH Equipment Clock
Secondary OMS
Backup OMS for a network element should the primary OMS fail. A network element
should be provisioned normally on the primary OMS and then be configured for use on
the secondary OMS. See also Geographic Redundancy.
Section
A transport entity in the transmission media layer that provides integrity of information
transfer across a section layer network connection by means of a termination function at
the section layer.
Section Adaptation (SA)
Function that processes the AU-pointer to indicate the phase of the VC-3/4 POH relative
to the STM-N SOH and assembles/disassembles the complete STM-N frame.
Section Overhead (SOH)
Capacity added to either an AU-4 or to an assembly of AU-3s to create an STM-1.
Always contains STM-1 framing and can contain maintenance and operational functions.
SOH can be subdivided into MSOH (multiplex section overhead) and RSOH (regenerator
section overhead).
SEF
Support Entity Function (in NE)
Self-healing
A network's ability to automatically recover from the failure of one or more of its
components.
Server
Computer in a computer network that performs dedicated main tasks that require
generally sufficient performance. See also Client.
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365-312-801R7.2
Issue 3, May 2007
Alcatel-Lucent - Proprietary
See notice on first page
GL-27