Lucent Technologies LambdaUnite Installation Manual page 350

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S SA
Service Affecting
SA
Section Adaptation
SD
Signal Degrade
SDH (Synchronous Digital Hierarchy)
A hierarchical set of digital transport structures, standardized for the transport of suitable
adapted payloads over transmission networks.
SDS
Standard Directory Service based on ANSI recommendation T1.245
SEC
Secondary
SEC
SDH Equipment Clock
Section
The portion of a transmission facility, including terminating points, between a terminal network
element and a line-terminating network element, or two line-terminating network elements.
Section Adaptation
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.
Self-Healing
A network's ability to automatically recover from the failure of one or more of its components.
SEMF (Synchronous Equipment Management Function)
Function that converts performance data and implementation specific hardware alarms into
object-oriented messages for transmission over the DCC and/or Q-interface. It also converts
object-oriented messages related to other management functions for passing across the S
reference points.
Server
Computer in a computer network that performs dedicated main tasks which generally require
sufficient performance.
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G L O S S A R Y
G L - 3 4
Lucent Technologies 365-374-059
Issue a, January 2002