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ABBREVIATION
S/P
SPI
SSF
SQ
STM–0/STM–1
SW
TANC
TD
TIM
TMN
TOR
TORC
TSD
TSF
TTF
TUG2/3
TUOH
TUP/UP
TU12/TU3
TX
URG
VCXO/VCO
VC12/VC3/VC4
VMMF
WAN
NOTES –
(*) Owing to change of name, all documents issued by the two ITU committees (CCIR ND
(*) Owing to change of name, all documents issued by the two ITU committees (CCIR ND
CCITT) in 1992 (and in some cases even before then) are classified as ITU–R and ITU–T,
respectively.
respectively.
(**) Substitutes PPS
ED
02
Serial/Parallel Converter
Synchronous Physical Interface
Server Signal Fail
Squelch
Synchronous Transport Module, levels 0 etc.
Software
Remote alarm due to failure of all power supply units
Layout drawing
Trace Identifier Mismatch
Telecommunication Management Network
Remote alarm indicating loss of one of the station batteries
Remote alarm due to a faulty/missing power supply unit
Trail Signal Degrade
Trail Signal Fail
Transport Terminal Function
Tributary unit group, level 2,3
Tributary Unit Overhead
Equipment Controller remote alarm
Tributary unit level 12, 3
Transmission
Urgent
Voltage controlled oscillator
Virtual Container, levels 12,3,4
Virtual Machine Management Function
Wide Access Network
3AL 91669 AA AA
MEANING
674
56
/
674
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