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SONET_Usr.bk Page 213 Wednesday, December 13, 2000 11:11 AM
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Glossary of Terms
Glossary
RSOH
Regenerator Section
Overhead
RSTE
Regenerator Section
Terminating Equipment
RS-TIM
Regenerator Section
Trace Identifier
Mismatch
RX
Receiver
S
S/N
Signal to Noise Ratio
SCPI
Standard Commands
for Programmable
Instrumentation
SDH
Synchronous Digital
Hierarchy
SDXC
Synchronous Digital
Cross Connect
SEF
Severely Errored Frame
SES
Severely Errored
Second
SESR
Severely Errored
Seconds Ratio
SF
Super Frame
SOH
Section Overhead
SONET
Synchronous Optical
Network
SPE
Synchronous Payload
Envelope
STE
Section Terminating
Equipment
STM
Synchronous Transport
Module
STS
Synchronous Transport
Signal
SUT
System Under Test
T
TCM
Tandem Connection
Monitoring
TDM
Time Division Multi-
plexing
TDMA
Time Division Multiple
Access
TE
Terminal Equipment
TMN
Telecommunications
Management Network
TOH
Transport Overhead
TU
Tributary Unit
TU-AIS
TU Alarm Indication
Signal
TUG
Tributary Unit Group
TU-LOM
TU Loss of Multiframe
TU-LOP
Loss of TU Pointer
TU-NDF
TU Pointer New Data
Flag
TX
Transmitter
U
UI
Unit Interval
V
VBR
Variable Bit Rate
VC
Virtual Channel
VC-n
Virtual Container
VP
Virtual Path
VT
Virtual Tributary
VXI
VMEbus Extensions for
Instrumentation
W
WAN
Wide Area Network
WDM
Wave Division Multi-
plexing
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