SLM
Signal Label Mismatch
Smart Communication Channel (SCC)
An HDLC messaging channel between the SDH-TE and the 5ESS host node. Similar to
the DCC messaging channels that are located in the STM-N section overhead.
SML
Service Management Level
SMN
SDH Management Network
SMS
SDH Management Subnetwork
SNC/I
SubNetwork Connection (protection) / Inherent monitoring
SNC/NI
SubNetwork Connection / Non Intrusive monitoring
SNR
Signal to Noise Ratio
Soft Windows
PC emulator package for HP platforms.
SOH
Section Overhead. 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 in MSOH (Multiplex Section OverHead)
and RSOH (Regenerator Section OverHead).
SONET
Synchronous Optical Network
Space Diversity (SD)
Reception of the Radio signal via mirror effects on Earth.
SPB2M
Subrack Protection for 2 Mbit/s Board
Specification and Design Language (SDL)
This is a standard formal language for specifying (essentially) finite state machines.
SPI
SDH Physical Interface Synchronous-Plesiochronous Interface
Squelch Map
Traffic map for SLM Add-Drop Multiplexer network elements that contains information
for each cross-connection in the ring and indicates the source and destination network
Glossary
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365-312-847R4.0
Issue 4, November 2006
Lucent Technologies - Proprietary
See notice on first page
GL-27
