Alcatel-Lucent 1643 AMS Operation Manual page 378

Glossary
Synchronization Supply Unit (SSU)
A circuit pack that recovers and reshapes the clock signal in order to filter out jitter.
Local (SSU_L) and Transit (SSU_T) types are available.
Synchronous
The essential characteristic of time-scales or signals such that their corresponding
significant instants occur at precisely the same average rate.
Synchronous Digital Hierarchy (SDH)
A hierarchical set of digital transport structures that is standardized for the transport of
suitably adapted payloads over transmission networks.
Synchronous Equipment Management Function (SEMF)
Function that converts performance data and implementation-specific hardware alarms
into object-oriented messages for transmission over the DCC and/or the Q-interface. The
SEMF also converts object-oriented messages that are related to other management
functions so that they can pass across the S reference points.
Synchronous Network
The synchronization of synchronous transmission systems with synchronous payloads to
a master Network clock that can be traced to a single reference clock.
Synchronous Transport Module (STM)
The information structure that is used to support (section layer) connections in SDH.
System Administrator
A user of the computer system on which the ITM-SC application can be installed. See
also User Privilege.
System Controller (SC)
A circuit pack that controls and provisions all units. It also contains the data
communication packet switch functionality that is necessary for routing of management
information between network elements and their management system.
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T TAP
Tunnel auto provisioning protocol
TCA
Threshold Crossing Alert
TCP/IP
Transmission Control Protocol/Internet Protocol
TDEV
Timing Deviation
TDM
Time Division Multiplexing
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Issue 4, May 2007