A: Actuator actuator
A: Amplifier amplifier
A: Attendance Employee Attendance
A: Attenuation Attenuation
AA: Antenna Amplifier Open Amplifier
AA: Architectural Acoustics Building Acoustics
AC: analogue controller analog controller
ACD: Automatic Call Distribution Automatic Assignment
ACS: Access Control System Dental Control System
AD: Addressable Detector Address Detector
ADM: ADD / DROP MULTIPLEXER Split Replies
ADPCM: Adaptive Differential Ulse Code Modulation Adaptive Difference Pulse Code Modulation
AF: Acoustic FeedBack Sound Feedback
AFR: AMPLITUDE / FREQUENCY RESPONSE Frequency Response
AGC: Automati Gain Control Automatic Gain Control
AHU: Air Handling Unit Air Processor
A-i: Auto-Iris Auto Aperture
AIS: ALARM INDICATION SIGNAL alarm indication signal
AITS: ACKNOWLED INFORMATION TRANSFER Service Confirmation
ALC: Automati Level Control Automatic Balance Control
ALS: ALARM Seconds Alarm
Alu: analogue Lines Unit Simulation User Line Unit
AM: Administration Module Management Module
AN: Access Network Access Network
ANSI: American National Standards Institute National Standards Society
APS: Automatic Protection Switching Automatic Switching
ASC: Automati Slope Control Automatic Slope Control
ATH: Analog Trunk Unit Simulation Tunnel
ATM: Asynchrous Transfer Mode Asynchronous Transfer Method
AU-PPJ: AU POINTER POSITIVE JUSTIFICATION Delivery Unit Pointer Adjustment
AU: Administration Unit Management Unit
AU-AIS: Administrative Unit Alarm Indication Signalau Alarm Indicator
AUG: Administration Unit Group Management Unit Group
AU-LOP: LOSS OF Administrative Unit Pointer Au Pointer Loss
AU-NPJE: AU POINTER NEGATIVE JUSTIFICATION ENTEM Negative pointer adjustment
AUP: Administration Unit Pointer Management Unit Pointer
AVCD: Auchio & Video Control Device Audiovisual Control
AWG: American Wire Gauge US cable specification
BA: Bridge amplifier bridge mapping
BAC: Building Automation & Control NET Build Automation and Control Network
Bam: Background Administration Module After the Management Module
BBER: Background block error Ratio Background block error ratio
BCC: B-Channel Connect Controlb Channel Connection Control
BD: Building Distributor
BEF: Buiding Entrance Facilities Building Entrance Facilities
BFOC: Bayonet Fibre Optic Connector Malls Optical Fiber Connector
BGN: Background Noise Background Noise
BGS: Background Sound Background Audio BIP-N: BIT INTERLEVED PARITY N CODE Bit Interface Even
B-ISDN: BRAND BAND ISDN Broadband Integrated Business Digital Network
B-ISDN: BROAD BAND -INTEGRATED Services Digital Network Broadband Integrated Business Digital Network
BMC: BURST MODE Controller burst mode controller
BMS: Building Management System Intelligent Building Management System
BRI: Basic Rate ISDN Basic Rate Integrated Business Digital Network
BS: base station base station
BSC: Base Station Controller Base Station Controller
BUL: Back Up Lighting Backup Lighting
C / S: Client / Server Client / Server
C: Combines mixer
C: Container container
CA: CALL Accounting Telephone Automatic Billing System
CATV: Cable Television cable TV
CC: CALL Control Call Control
CC: COAX CABLE Coaxial Cable
CCD: Charge Coupled Decices Charge Coupled Device
CCF: Cluster Control Function Cluster Control
CD: Campus Distributor Buildings Package
CD: combination detector temperature, smoke composite detector
CDCA: Continuous Dynamic Channel Assign Continuous Dynamic Channel Assignment
CDDI: Copper Distributed Data Contact Cable Distributed Data Interface
CDES: Carbon Dioxide Extinguisbing System CO2 System
CDMA: Code Division Multiplex Access Code Division Multiple Access
CF: Core Function Core Function
CFM: Compounded Frequency Modulation is frequent
CIS: CALL Information System Call Information System
CISPR: International Special ConmitteE on Radio Interference International Radio Interference Table
CLNP: ConnectionLess Network Protocol No connection mode Network layer protocol
CLP: Cell Loss Priority Cell Lost Priority
CM: Communication Module Communication Module
CM: Configuration Management Configuration Management
CM: Cross-Connect Matrix cross-connect matrix
CMI: CODED MARK Inversion Tag Reversion Code
CMise: Common Management Information System Information Utility Management Information Protocol Service Unit
CPE: Convergence Protocol Entity Convergence Agreement Entity
CR / E: Card Reader / Encoder (Ticket Reader) Card Reader / Encoder
CRC: CYCLIC Redundancy CHECK Cycle Redundant Check
CRT: Cathode ray Tabe Display, Monitor, Cathode Ray Tube
CS: Convergence Service Convergence Services
CS: CABLERON SPECTRUM Old Naternation Technology
CS: Ceiling Screen Smoky Wall
CS: Convergence SUBLAYER
CSC: Combined Speaker Cabinet Combined Audio
CSCW: Computer Supported Collaborative Work Computer Support Site
Cses: Continuius Sevelely Erroored Second Continuous Severe Mistake Seconds CSF: Cell Site Function Single Base Station Function Control
CTB: Composite Triple Beat composite three-priced
CTD: Cable Thermal Detector Cable Row Type Impact Detector
CTNR: Carrier to Noise Ratio carrier ratio
CW: Control Word Control Word
D: Directional directivity
D: distortion distortion
D: Distributive distributed
DA: Distribution Amplifier Allocated
DBA: Database Administrator database administrator
DBCSN: Database Control System Nucleus Database Control System Core
DBOS: Database Organizing System Database Organization System
DBSS: Database Security System Database Security System
DC: Door Contacts Gate Sensors
DCC: Digital Communication Channel Digital Communication
DCN: Data Communication Network Data Communication Network
DCP-I: Distributed Control Panel -intelligent Smart Distributed Controller
DCS: Distributed Control System Different Control System
DDN: Digital Data NetWork Digital Data Network
DDS: Direct Dignital Controller Direct Digital Controller
DDW: Data Describing Word Data Description
Dect: Digital Enhanced Cordless Telecommunication Enhanced Digital Cordless Communication
DFB: Distributed Feedback distribution feedback
DID: Direct Inward Direct Direct Relay Way, Adjust Dial to Extension User
DLC: DATA LINK Control Layer Data Link Layer
DLI: DECT LINE Interface
Direct Outward DiRing One Dial Sound
DPH: DECT Phone
DRC: Directional Response Cahracteristics directivity response
DS: Direct Sound straightforward
DSP: DIGITAL SIGNAL processing digital signal processing
DSS: DEISION Support System Decision Support System
DTMF: Dual Tone Multi-Frequency Dual Side
DTS: Dual -Technology Sensor Double Sensor
DWDM: Dense Wave-Length Division MultipleXing Demolition Division
DXC: Digital Cross-Connect digital cross connection
E: Emergency lighting lighting
E: Equalizer equalizer
E: Expander Expander
EA-DFB: Electricity Absorb-Distributed FeedBack Electric Absorption Distribution Feedback
ECC: Embedded Control Channel Embed or Control Channel
EDFA: Erbium-Doped Fiber Amplifier Equipment Optical Amplifier
EDI: Electronic Data INTEREXCHANGE Electronic Data Exchange
EIC: Electrical Impedance Characteristics Resistance Characteristics
EMC: Electro Magnetic Compatibiloty Electromagnetic Compatibility
EMI: Electro MagneTic InterferenceElectromagnetic interference
EMS: ElectromagNetic Sensitibility Electromagnetic Sensitivity EN: Equivalent Noise Equivalence Noise
EP: EMERGENCY POWER Emergency Power Supply
ES: Emergency SOKET Emergency Socket
ES: evacuation SigVial evacuation lighting
ESA: Error Seconda error second type A
ESB: ERRORSECONDB error second type B
ESD: Electrostatic Discharge electrostatic discharge
ESR: Erroored Second Ratio error second ratio
ETDM: Electrical Time Division Multiplexing Pixabay
Etsi: European Telecommunication Standards Institute Society
F: Filter filter
Fab: fire alarm Bell fire alarm
FACU: Fire Alarm Control Unit Fire Automatic Alarm Control Device
FC: Failure Count failure
FC: FREQUENCY Converter Frequency Converter
FCC: Fire alarm System Fire Alarm System
FCS: Field Control System Fieldbus
FCU: Favn Coil Unit fan coil
FD: Fire Door fire door
FD: Flame Detector Flame Detector
FD: Floor Distributor
FD: FREQUENCY DIRSDER Division
FDD: FREQUENCY DIVISION DUAL Frequency Division Duo
FDDI: FiberDistribute Data Interface Fiber Cable Distributed Data Interface.
FDDIF: Fiber Distributed Data Inferface Cable Distribution Data Interface
FDMA: FREQUENCY DIVISION MULTIPLE Access Frequency Division Multiple Access
Fe: Fire Extirguisher fire elevator
Febe: Far End Block Error remote block error
FEXT: FAR END Crosstalk distal crosstalk
FFES: Foam Fire Extionuishing System Foam Fire Extinguishing System
FH: Fire Hydrant fire hydrant
Fi: Fee Indicator cost display
FL: Focal Length Focus
FL: Fuzzy Logic Fuzzy Logic
FM: Faiilt Management Failure Management
FPA: Fire Public Address Fire Accident Broadcast
FPD: Fire Public Derice Firefighter
FR: Frequency Response
FRD: Fire Resis Tamt Damper fire valve
FRS: Fire Resistant Shutter fire shutter
FSK: FREQUENCY SHIFT Keying Movement Key Control
FSU: Fixed Subscriber Unit single user fixed table
FTHD: FIXED TEMPERATUTE Heat Detector
FTP: Foil Tnsed Pair metal foil twisted cable
FTTB: Fiber to the building fiber to the building
FTTC: Fiber to the Curb fiber to the roadside
FTTH: Fiber to The Home Fiber to Family
FW: Fire Wall firewall
FWHM: Full Width Half Maximum Pulse Half High Width
Pacr: attonuation to crosstalk Ratio Attenuation and crosstalk ratio
GAP: Gaussian (Filtered) Frequency Shift Keying Gaussian filter frequency shift keying
GBS: Glass Break Sensors Glass Broken Sensor GC: Generic Cabling Integrated Wiring
GIB: Generic Information Block General Information Module
GNE: Gateway Network Element Gateway
GSM: Global System for Mobile Communications Global Mobile Communications System
H: Hybrid hybrid
HCBS: High C Bus Servers Unit High Speed C Bus Service Unit
HCS: Higher Order Connection Supervision High Order Connection Monitor
HD: Heat Detecter Insulation Detector
HDB3: High Density Bipolar of Order 3Code High Density Bipolar Code
HDLC: High Data Link Control Advanced Data Link Control
HDLC: High Digital Link Control Advanced Data Link Control
HDSL: High-Bit -rate Digital Subscriber Link High Bit Digital User Link
HDTV: High Definition Television HD
HEC: Header Ervor Control: Letterhead error control field
HEMS: High -level Entity Management System Advanced Entity Management System
HFC: Hybrid Fiber COAX Fiber - Coaxial Cable Mixed System
Hgrp: Home Optical Network Huawei Company Special Agreement
HiFi: high fidelity high-fidelity
HIPPI: High Performance Parfallel Interface High Performance Parallel Interface
HMP: Host Monitoring Protocol Host Monitoring Protocol
HOA: High Order Assembler Higher Order Mount
HOAPID: High Order Path Access Point Identifier Higher Order Channel Access No Point Identifier
HOI: High Order Interface High Order Interface
Honet: Home Optical Network Huawei Integrated Business Access Network Trademark
HO-TCM: High Order Tandem Connection Monitor High Order Channel Series Connection Monitor
HOVC: High Order Virtual Container virtual
HPA: High Order Path Adaptation High Order Adaptation
HPC: High Order Path Connection Higher Order Channel Connection
HPOM: High -Order Path Overhead Monitor Higher Order Channel Overhead Monitor
HPP: High -Order Path Protection Higher Order Channel Protection
HP-RDI: Higher Order Path -remote Defect Indication Higher Order Channel Receive Defect Indication
HP-REI: Higher Order Path-Remote Errorindication Higher Order Channel Far Error Indication
HPT: High Order Path Termination Higher Order Channel Terminal
HRDS: Hypothetical Reference Digital Section Hypothesis number
HSUT: High -Order Path Supervision Unequipped Termination Higher Order Channel Monitoring Unloaded
HVAC: Heating Ventilation Air Conditioning HVAC
HWS: Hot Water Supply Hot Water Supply System
I: interference crosstalk
IA: Intruder Alarm anti-theft alarm
ICMP: Internet Control Message Protocol Control Information Agreement
IDC: InsuCation Displacement Connection Insulation Movement Connector Ids: Industrial Distribution System Industrial Wiring System
IFC: Intelligent Fire Controller Lighting Intelligent Controller
Ild: INJECT LIGHT DIODE Injection Laser Diode
IM: impedance matching impedance match
IMA: Interactive MultiMedia Association Interactive Multimedia Agreement
IM-DM: INTENSITY MODULATION-DIRECTION MODULATION Direct intensity modulation
IN: Information Network Information Network
IO: Information Outlet Information Socket
IOS: Intelligent Out Station Intelligent Peripheral Station
IPEI: International Portable International Mobile Device Identification
IPTU: INDOOR PAN & TILT Unit Indoor Level Pitching
IPUI: International Portable User Identity International Mobile User ID Number
ISD: Ionization Smoke Detector Ion Smoke Detector
IT: INFORMATION TECHNOLOGY Information Technology
ITU: International Telecommunications Union International Telecommunications Union
ITU-T: Original CCITT, is a committee of the International Telecommunications Union
ITV: Interactive Tevevision Interactive TV
JIT-Discussion Conference System Uptender
L: Lens camera lens
LAN: Local Area NetWork
LAPB: LINK Access Procedure-Balanced Link Access Procedure ---- Balance
Lapd: Link Access Procedure D-CHANNEL D Channel Link Access Protocol
LCD: Liquid Crystal Display LCD Display
LCL: Longituchinal Conroction Loss Longitudinal Mode Transform Loss
LCN: Local Communication Network Local Communication Network
LCS: Lower ORDER Connection Supervision Low Order Connection Monitor
LD: Laser Diode excitation diode
Le: Local Exchange Local Switching Network
LIGHT EmitTirng Diode LED
LIU: Lightguide Interconnection Unit fiber interconnect device
LLC: Logic Link Control Layer Link Control Layer
LLME: LOW LAYER Management Entity Low-level Management Entity
LM: Leel Modulation Level Adjustment
LNA: low noise amplifier low noise amplifier
LOF: Loss Of Frame Frame lost
LOI: Low Order Interface Low Order Interface
LOP: Loss of Pointer pointer lost
Los: Loss Of Signal Signal Loss
LO-TCM: LOW Order Tandem Connection Monitor Low Order Channel Series Connection Monitor
LOVC: LOW Order Virtual Container low-order virtual container
LPA: Lower ORDER QATH Adaptation Low Order Channel Advice
LPC: Lower ORDER PATH Connection Low Order Channel Connection
LPOM: low-Order Path Overhead Monitor low-order channel overhead monitor
LPP: low-Order Path Protection Low Order Channel Protection
LPT: LOWER ORDER PATH TERMINATION low-order channel terminal LSBCM: Laser Base Current Monitor Laser Bias Monitor
LSUT: LOW -ORDER PATH Supervision Unequipped low-order channel monitoring unloading terminal
LTC: Londline Trunk COUTROLLER Wired Line Assign
Lu: Line Unit line unit
Mac: Medium Access Control Layer Media Access Control Layer
MBMC: Multiple Burst Mode Controller multi-burst mode controller
MCF: Message Communication Function Message Communication
MD: Mediation Device Medical Binder
MFPB: Multi-Frequency Press Button Multi-frequency button
MIB: Management Information Information Base Management Information Library
MIC: Mediu Interface Connector Media Interface Connector
Mio: MultiUser Information Outlet multi-user information socket
MLM: Multi-longitudinal Mode Multi-Direction
MOBILE Management Mobile Management
MMDS: MalticHanned MicroWare Distribution System Multi-channel microwave distribution system
MMO: Multionedia Outlet multimedia socket
MN-NES: MN-NetWork Element System NE management system
MN-RMS: MN-Region Management System Network Management System
Mo: Managed Object Management Target
MSA: Multiplex Section Adaptation Reset Section Adaptation
MS-AIS: MUTIPLEX Section-Alarm Indication Signal Recourse Alarm Indicator
MSOH: Multiplex Section Overhead Reset Dating
MSP: Multiplex Section Protection Reproduction
MS-RDI: MULTIPLEX Section-Remote Defect Indication Reclaimed Different Defect Indication
MST: MULTIPLEX Section Termination Demographic Terminal
MSU: Multi-Subscriber Unit multi-user unit
MTIE: Maximum Time Interval Error Maximum Time Interval Error
MUX: MULTIPLEXER flexible
NDF: New DataFlag New Data Identification
NDFA: Niobium-Doped Fiber Amplifier Polygonal Optic Amplifier
NE: NETWORK ELEMENT NE
Next: Near End Crosstalk near-end crosstalk
NMS: Network Management System Network Management System
NNE: NON-SDH NETWORK ELEMENT Non-SDH NE
NNI: Network Node Interface Network Node Interface
NPI: NULL POIINTER INDICATION Invalid Pointer Indication
NWK: NetWork Layer Network Layer
NZ-DSF: Non Zero-Dispersion Shift Fiber Non-Leading Displacement Fiber
Oam & P: Operation Administration, Maintenance and Provisioning, Management, Maintenance, and Preset
OAM: Operation, Administration and Maintenance operation, management, and maintenance
Obfd: Optical BEAM Flame Detector Line Speed Flame Detector
OC-N: Optical Carrier Level-N optical carrier grade N
OCR: Optical Character Recogmition Optical Character Recognition
OEIC: Optoelectronic Integrated Circuit Photoelectric Integrated Circuit
Ofa: Optical Fiber Amplifier Fiber Amplifier
OHP: Overhead Processing overhead processing
Olt: Optical Line Terminal Fiber Wire Terminal
ON: ORALL NOISE Normal Noise
ONU: OPTICAL NETWORK Unit Fiber Network Unit
OOF: OUT OF FRAME Frame Out
OOP: Object Oriental Programming Object - Oriented Program Design
OS: OPERATING SYSTEM operating system
OSC: Oscillator Oscillator
OSI: Open Systems Interconnection Open System Interconnection
Ottk: Optical Time Doman Reflectometer Light time domain reflection
Otdm: Optical Time Division Multiplexing
PA: Power amphfier power amplifier
PA: Power Amplifier Power Amplifier
PABX: Private AuntAmatic Branch Exchange program-controlled digital automatic switch
Paging: Wireless Call System
PAL: PINHOLE ALC LONS pinhole automatic brightness control lens
Park: Portable Access Rights Key Mobile User Access Permissions Identification
Pas: Public Address System Public Broadcasting System
PBX: Private Brancn Exchange program-controlled user switches
PC: Pan Unit & Control Punction and PTZ controller
PC: Proximinty Card close to the card
PCM: Pulse Code Modulation Pulse Code Modulation
PCS: Personal Communication Service Personal Communication Service
PDFA: PRASEODYMIUM-DOPED FIBER AMPLIFIER Doped Fiber Amplifier
PDH: Plesiochronous Digital Hierarchy Quasi-Synchronous Digital Series
PDN: Public Data NetWork Public Data Network
PDS: Premises Distribution Systemn Building Structured Integrated Wiring System
PF: Pressurization Fan pressurized fan
PG: Pressure Gradient Data Differential
PID: Passire Infrared Detector Passive Infrared Sensor
PJE: POINTER JUSTIFICATION EVENT Pointer Adjustment Event
PLC: Programmerable Logic Controller programmable controller
PM: Power Matching power match
PMS: Proorty Management System Synd Management System
PO: Pressure Operated Pressure
POH: Path Overhead channel overhead
PPI: PDH Physical InterfacePDH Physical Interface
Preamplification: Pre-enlarged
PRI: PRIMANY RATE INTERFACE Byrog
PRM: Patter Recogniton Method Mode Recognition
PSC: Protection Switching Count Protection Revertency Count
PSD: Photoelectric Smoke Detector Optoelectronic Smoke Detector
PSD: Protection Switching Duration Protection Switch Duration
PSK: Phase Shift Keying Movement Key Control
PSNT: PONVER SUM NEXT integrated near-end crosstalk
PSPDN: Packet Switch Public Data NetWork Public Packet Switching Network PSTN: Public Switch Telephone Network Public Switch Net
PU: PICK UP pickup
PVC: polyvingl chloride polyvinyl chloride
PVCS: Public Video Conferring System Utility Conference Television System
PWS: Power System Power System
ITU-T: International Telecommunication Union-Telecommunication Sector International Telecom Alliance - Telecommunications Standard Ministry R: Receiver Terminal Decoder
R: REVERBERATOR reverber
RC: Radio Communication Mobile Communication
RC: Room's Coefficient Room Coefficient
RCU: Remote Control UNITS Terminal Controller
RDI: Remote Defect Indication Did Frequency Failure Instruction
REG: Regenerator regenerator
Resolution: Definition
RF: RADIO FREQUENCY RF
Rhe: Romote Head End Front End
RMC: REPEATER Management Controller Antenna Channel Controller
RMS: root mean square root value
RMU: Redundancy Memory Unit Redundant memory
RORTD: RATE RISE Thermal Detector Different Temperature Detector
RR: REVERBERATION RADIUS reverberation radius
RS: Reflected Sound Reversion Field
Rsoh: regenerator section ouerhead regeneration section overhead
RSSI: Radio Signal Stregth Indicator
RST: Regenerator Section Termination Regeneration Segment Terminal
RSU: Remote Subscriber Unit remote user unit
RT: Real Time Real Time
RT: REVERBERATION TIME Reverberation Time
RWS: Remote Workstation remote workstation
S: SPRINKLER dispenser
S: stereo double channel
S: strike electronic door lock
SAA: Sound Absorption Ability sound absorbing capacity
SAR: Segmetation and Reassembly SUBLAYER Displant
SATV: SATE LLITE Satellite TV
SBS: Synchronous Backbone System Synchronous Information Backbone System
SBSMN: SBS SBS Management Network Series Transport Equipment Non-Tube System
SC: Smart Card Smart Card
SC: Subscriber Connector (OPTIAL FIBER Connector) User Connector (Fiber Connector)
SC: Supervison Center Central Station Monitoring Center Management Center
SCADA: Monitoring and Data Acquisition Software
SCB: SYSTEM Control Board System Control
SCC: System Control & Communication System Communication Control
SC-D: SAPLEX SC Commector Dual ISC Connector
SCD: Sound Console Desk Scheduling
SCPC: Single Chnanel Per Carrier Satellite Backhaver
SCS: Stractured Cabling System Structured Wiring System
SD: Signal Degraded signal deterioration
SD: Smoke Damper exhaust valve
SD: smoke detector smoke detector
SD: System Distortion system distortion
SDCA: SYNCHRONIZATION DCA Synchronous Data Adapter SDMA: Spaee Division Multiplex Access Mature
SDXC: SYNCHRONOS DIGITAL CROSS Connect with small digital cross-connect
SE: Sound Energy Sound Energy
Sec: SDH Equipment Clock SDH Device Clock
Sed: Sound Energy Density Sound Energy Density
Seef: Smoke Extractor Exhaust Fan exhaust fan
SEMF: Synchronous Equipment Management Function Device Management
SES: SEvelely Erroored Second Serious error
Sesr: Sevelely Errlred Second Ratio Serious error
SETPI: SYNCHRONOUS Equipment Timing Physical Interface Synchronous Device Timing Physical Interface
SENCHRONOS Equipment Timing Source Synchronous Device
SF: Spur Feeder Branch Line
SF: Subscribers Feeder User Line
SFN: Sound Field Nonunifornity Sound field unevenness
SFP: Sound Field Processor Voice Survey
Si: Sound Installation Audio Equipment
Si: Sound Insulation soundproof
Sics: Simultaneous Interpretation Conference System Homo Interpretation System
SIPP: Service Interface and protocol processing unit service interface and protocol processing unit
SLC: SATE LLITE COMMUMICATION Satellite Communication
SLI: Synchronous Line Optical Interface Synchronous Line Opportunity
Slic: Subscriber Line Interface Controller User Line Interface Controller
SLM: Signal Label mismatch signal tag mismatch
SM: SYNCHRONOUS MULTIPLEXER Synchronization Reader
SMF: System Management Function System Management
SMS: SDH Management Sub --Network SDH Manage
SNA: System Network Architecture System Network Construction
SNI: Service Node Interface Business Node Interface
SNK: Sighal to Noise Ratio Signal
SOA: SEMICONDUCTOR OPTICAL AMPLIFIER Semiconductor Optical Amplifier
SOH: section overhead section overhead
SONET: Synchronous Optical Network Synchronous Optical Network
SPF: Service Port Function Service Port Function
SPI: SDH Physical InterfaceSDH Physical Interface
SPL: Sound Pressure Level Soot pressure level
SRL: Stractural Return Loss Machine Wave Loss
SS: SHOCK SENSORS Vibration Sensors
SS: Sound Source Source
SS: SPRINKLER SYSTEM Automatic Sprinkler System
SSB: SINGLE SIDE BAND Single Side Monitor
SSM: Synchronous Status Message Synchronous Status Information
SSU: Scan and Signal Unit Scan and Signal Unit
ST: Straight Tip Direct Fiber Connector
ST: Subscribers TAP User Branch
STB: SET -TOP -BOX machine box
STC: Short -Term Card Time Ticket
STE: SIGNALING TRANSFER EQUIPMENT Signaling Conversion Device STG: Synchronous Timing Generator Synchronous Timer
STI: Surface Fransfer Inpedane Surface Transmission Discharge
SURFACE TRANFER Inpedance Surface Transmission Impedance
STM-N: SYNCHRONOUS TRANSPORT MODULE LEVEL-N Synchronous Transfer Module Level N
SU: Subscriber Unit user unit
SV: Smoke VENT smokers
SVCS: Sound Veinforcement System Snap System
T: Teletext
T: Terminal Terminal
TA: TRUNK AMPLIFIER trunk amplifier
Tc: Telecommunication Closet Communication Socket
TC: Transient Characteristic Instant Features
TCI: Trunk Cabling Interface Star Connection
TCP / P: Transmission Control Protocol Inter-Network Protocol Transport Control Protocol / Network Agreement
TCS: Tele Communication SYSTEM Communication System
TCS: Telecommunication System Communication System
TD: Ticket Dispemser card
TIME DIVISION DUAL time division duplex
TDEV: Time Deviation Time Deviation
TDM: Time Division Multiplexing Time Division
TDMA: Time Division Multiple Address Multiple Access
TDS: Time DiVision Switching Time Switching Structure
Telex: User telegrams
TEP: Time / Event Software
TF: Transfer Function Transfer
TFCC: Transmission Frequenay Characteristic Transfer Frequency Characteristics
TGNP: The Greatest Noise Power Maximum Noise Power
Tim: Trace Identifier mismatch tracking identifier mismatch
TM: Termination Multiplexer Terminal Reader
TMN: Telecommunication Management Network
TMN: Telecommunication Management Network
TNL: Total Noise Level Total Noise Grade
TO: Telecommunications Outlet Communication Socket
TP: Tunst Pair on the strand
Tr: token Ring token Network
TSI: TimeSlot Interxhange Time slot Exchange
TSU: Time Switching Unit Time slot exchange unit
TTF: TRANSPORT TERMINAL FUNCTION Transport Terminal Function
TTS: TRI TECHNOLOGY SENSOR Trigator Sensors
TU: TRIBUTARY Unit Branch Unit
Tug: Tributary Unit Group Branch Unit
TU-LOM: TU-LOSS OF MULTI-FRAME Branch Double Frame Loss
TUP: TRIBUTARY Unit Pointer Branch Unit Pointer
TUPP: TRIBUTARY UNIT PAYLOAD Process Support Purpose Processing
UAT: Ultra Aperture Terminal Super Small Call Satellite Ground Receive Station
UL: Underwriters Laboratory Guarantee Laboratory
UM: Unidirectional MicroPhines single-point sex microphone
Va: Vacant Auditoria Empty Field
VCI: Virtual Chammel Identifier Virtue Channel Identification
VCS: Video Conferphone System Conference TV System VI: Video Interphone Visual Intercom Doorbell
Video Switcher Image Switch Controller
VideoTeText: Visual graphic
VOD: Video on Demand Video On-demand
VSAT: Very Small Aperture Terminal Very Small Vertical Antenna Earth Station
