All Important Telecom Full Form or Telecom Abbreviation List

Telecom Full Form-Abbreviation
Today all people directly or indirectly connected with Telecommunications. By this Telecommunication system we can send data like audio, video, messages from one device to another device. In this telecommunications system, data is transmitted from one device to another device in the form of electrical signals known as carrier waves. Telecom is a universal word that comes from TelecommunicationsToday all people around the world are connected to each other through this telecommunications system.

Now we will discuss different types of Telecommunications related abbreviation or full form which are very important for everyone.

No.
Acronym
Full Form
1
GSM
 Global System for Mobile(Communication)
2
GPRS
 General Packet Radio Service
3
NAP
 Network Access Point
4
ISD
 International Subscriber Dialing
5
CDMA
 Code Division Multiple Access
6
BSC
 Base Station Controller
7
RFT
 Radio Frequency Transmitter
8
GEO
 Geostationary Earth Orbit
9
DSS
 Direct Satellite Services
10
SDLC
 Synchronous Data Link Control
11
IMSI
 International Mobile Subscriber Identity
12
SMSC
 Gateway Mobile Switching Center
13
DTA
 Data Transfer Adapter
14
DTC
 Digital Traffic Channel
15
IVRS
 Interactive Voice Response System
16
CGSA
 Cellular Geographic Service Areas
17
RNC
 Radio Network Controller
18
NPDB
 Number Portability Database
19
BFS
 Broadcast File System
20
BGCF
 Breakout Gateway Control Function
21
BGP
 Border Gateway Protocol
22
BIU
 Broadband Interface Unit
23
BRAS
 Broadband Remote Access Server
24
BOPL
 Broadband Over Power Line
25
BRI
 Brand Rating Index
26
BRS
 Broadband Radio Service
27
TMN
 Telecommunication Management Network
28
UMTS
 Universal Mobile Telecommunications System
29
FLAG
 Fiber Link Around the Globe
30
VPS
 Voice Processing System
31
DPCM
 Differential Pulse Code Modulator
32
VMS
 Voice Mail System
33
PAD
 Packet Assembler And Disassembler
34
PCN
 Personal Communications Network
35
VAC
 Voltage Alternating Current
36
ATC
 Alarm Traffic Controller
37
AFC
 Automatic Frequency Control
38
PDC
 Personal Digital Cellular
39
WAP
 Wireless Application Protocol
40
WCDMA
 Wideband Code Division Multiple Access
41
OMF
 Object Management Framework
42
FM
 Frequency Modulation
43
PCO
 Public Call Office
44
FDM
 Frequency Division Modulation
45
FSS
 Fixed Satellite Service
46
LEO
 Low Earth Orbit
47
MAP
 Mobile Application Part
48
POTS
 Plain Old Telephone Service
49
kHz
 kilohertz (thousand hertz)
50
MHz
 Megahertz (million hertz)
51
AVC
 Advanced Video Coding
52
AVI
 Advanced Video Interface
53
AWGN
 Additive White Gaussian Noise
54
BDF
 Broadband Digital Forward
55
BDR
 Baseband Digital Reverse
56
BERT
 Bit Error Rate Test
57
BMS
 Business Management System
58
BPF
 Band-Pass Filter
59
UPR
 User Performance Requirements
60
GMRS
 General Mobile Radio Service
61
SGSN
 Serving GPRS Support Node
62
PDSN
 Packet Data Switched Network
63
AUC
 Authentication Center
64
PUK
 PIN Unblocking Key
65
SIS
 Subscriber Identity Security
66
SIM
 Subscriber Identity Module
67
UMTS
 Universal Mobile Telecommunication System
68
IMN
 Intelligent Mobile Network
69
VLR
 Visitor Location Register
70
BPI
 Baseline Privacy Interface
71
DCF
 Dispersion Compensating Fiber
72
DCR
 Digital Cable Ready
73
CTO
 Chief Technology Officer
74
ATM
 Asynchronous Transfer Mode
75
ATM
 Automated Teller Machine
76
DCP
 Device Control Protocol
77
ACTS
 Advanced Communication Technology Satellite (NASA)
78
CLASS
 Custom Local Area Signaling Services
79
POC
 Point Of Contact
80
DATE
 Duly Authorized Telecommunications Entity
81
FOB
 Free On Board
82
IF
Intermediate Frequency
83
BOD
 Bandwidth on Demand
84
DID
 Direct Inward Dialing
85
BOT
 Build Operate Transfer
86
CAP
 Competitive Access Provider
87
IN
 Intelligent Network
88
CGI
 Common Gateway Interface
89
FAT
 Factory Acceptance Test
90
POM
 Project Office Manager
91
POP
 Point of Presence
92
COO
 Chief Operating Officer
93
AMPS
 Advanced Mobile Phones System
94
SDI
 Secure Digital Interface
95
SRTP
 Secure Real-time Transport Protocol
96
SSL
 Secure Sockets Layer
97
TCAP
 Transaction Capabilities Application Part
98
TCM
 Tandem Connection Monitoring
99
UNI
 User Network Interface
100
VPI
 Virtual Path Identifier
101
WSS
 Wavelength Selective Switch
102
VPLS
 Virtual Private LAN Service
103
UPS
 Uninterruptible Power Supply
104
TCO
 Total Cost of Ownership
105
TCP
 Transmission Control Protocol
106
SSM
 Source Specific Multicast
107
SSMF
 Standard Single Mode Fiber
108
SMF
 Single Mode Fiber
109
SMS
 Service Management System
110
SDMI
 Secure Digital Music Initiative
111
SDP
 Session Description Protocol
112
DBS
 Direct Broadcast Satellite
113
DC
 Direct Current
114
DCA
 Digital Cable Application
115
CSS
 Content Scrambling System
116
CSV
 Comma Separated Value
117
BSS
 Business Support System
118
TRAI
 Telecom Regulatory Authority Of India
119
ASR
 Access Switch Router
120
ASTB
 Advanced Set-Top Box
121
BTS
 Business Telecom Services
122
CORBA
 Common Object Request Broker Architecture
123
COT
 Central Office Terminal
124
CTAM
 Cable & Telecommunications Association for Marketing
125
CTB
 Composite Triple Beat
126
CTIA
 Cellular Telecommunications and Internet Association
127
DCC
 Data Communication Channel
128
DCD
 Downstream Channel Descriptor
129
CEA
 Consumer Electronics Association
130
CEP
 Cable Entry Point
131
CIFS
 Common Internet File System
132
CNR
 Carrier-to-Noise Ratio
133
CSO
 Composite Second Order
134
CSR
 Customer Service Representative
135
COLD
 Central Office Layout Design
136
COPS
 Common Open Policy Service
137
CIM
 Common Information Model
138
CIR
 Committed Information Rate
139
CER
 Codeword Error Ratio
140
CES
 Circuit Emulation Service
141
ODA
 Outlet Digital Adapter
142
ODRL
 Open Digital Rights Language
143
CRL
 Certificate Revocation List
144
CRM
 Customer Relationship Management
145
ASIC
 Application-Specific Integrated Circuit
146
ASM
 Asset Management System
147
ASP
 Average Selling Price
148
FSK
 Frequency Shift Keying
149
FTMD
 Full Track Music Download
150
CDR
 Call Detail Record
151
CD-ROM
 Compact Disk-Read Only Memory
152
CMTS
 Cable Modem Termination System
153
OEM
 Original Equipment Manufacturer
154
OEPL
 Optical Ethernet Private Line
155
CMOS
 Complimentary Metal-Oxide Semiconductor
156
CMS
 Call Management Server
157
DMCA
 Digital Millennium Copyright Act
158
DMH
 Degraded Modem Hours
159
DSP
 Digital Signal Processor
160
DSSS
 Direct Sequencing Spread Spectrum
161
EAS
 Emergency Alert System
162
ECR
 Efficient Consumer Response
163
EPON
 Ethernet Passive Optical Network
164
EPRI
 Electric Power Research Institute
165
FCRC
 Fragment Cyclic Redundancy Check
166
FDD
 Frequency Division Duplexed
167
SDB
 Switched Digital Broadcast
168
SDH
 Synchronous Digital Hierarchy
169
SLIC
 Subscriber Line Interface Card
170
SLM
 Signal Level Meter
171
SRM
 System Resource Manager
172
SRS
 Stimulated Raman Scattering
173
SVOD
 Subscription Video on Demand
174
SVP
 Secure Video Processor
175
UGS
 Unsolicited Grant Service
176
UHF
 Ultra High Frequency
177
UMA
 Unlicensed Mobile Access
178
UNE
 Unbundled Network Element
179
VLAN
 Virtual Local Area Network
180
VLL
 Virtual Leased Line
181
WPE
 Wireless Plant Extension
182
WRED
 Weighted Random Early Detection
183
EPG
 Electronic Program Guide
184
DSCP
 Differentiated Service Code Point
185
DSL
 Digital Subscriber Line 
186
DMA
 Designated Marketing Area
187
DMC
 Dual Modem Cards
188
DAS
 Direct Attached Storage
189
DAT
 Digital Audio Tape
190
DBPSK
 Differential Binary Phase Shift Keying
191
CPE
 Customer Premises Equipment
192
CRA
 Contention Resolution Algorithm
193
ASCII
 American Standard Code for Information Interchange
194
ASI
 Asynchronous Serial Interface
195
BTSC
 Broadcast Television Systems Committee
196
CAB
 Cable Advertising Bureau
197
CAC
 Call Admission Control
198
RAID
 Redundant Array of Inexpensive Disks
199
RBOC
 Regional Bell Operating Company
200
ROAP
 Rights Object Acquisition Protocol
201
ROB
 Return on Bandwidth
202
SPP
 Serial Port Profile
203
SPTS
 Single Program Transport Stream
204
STS
 Synchronous Transport Signal
205
SUT
 System Under Test
206
TSR
 Technical Service Representative
207
TSS
 Telephony Switching Sub-System
208
UCC
 Upstream Channel Change
209
VER
 Virtual Ethernet Ring
210
WPA
 Wireless (Wi-Fi) Protected Access
211
WPAN
 Wireless Personal Area Network
212
VPN
 Virtual Private Network
213
VRF
 Virtual Routing and Forwarding
214
VHF
 Very High Frequency
215
VHS
 Video Home System
216
PID
 Packet Identifier
217
PKI
 Public Key Infrastructure
218
PLC
 Packet Loss Concealment
219
PVC
 Private Virtual Circuit
220
PVR
 Personal Video Recorder
221
QAM
 Quadrature Amplitude Modulation
222
RKS
 Record Keeping Server
223
RMS
 Root Mean Square
224
RNOC
 Regional Network Operations Center
225
SIP
 Session Initiation Protocol
226
SLA
 Service Level Agreement
227
SLC
 Shorten Last Codeword
228
STM
 Synchronous Transport Module
229
STP
 Spanning Tree Protocol
230
WAN
 Wide Area Network
231
WCD
 Wideband Channel Descriptor
232
WCM
 Wideband Cable Modem
233
EML
 Externally Modulated Laser
234
EMM
 Entitlement Management Message
235
EMS
 Element Management System
236
DVR
 Digital Video Recorder
237
DVS
 Digital Video Standard
238
DWDM
 Dense Wavelength Division Multiplex
239
CLV
 Consumer Lifetime Value
240
CMLA
 Content Management License Administrator
241
CCM
 Constant Coding and Modulation
242
CCS
 Centum Call Seconds
243
ATSC
 Advanced Television Systems Committee
244
AUP
 Acceptable Use Policy
245
CD
 Compact Disc
246
CDC
 Connected Device Configuration
247
LRU
 Least Recently Used
248
LSB
 Least Significant Byte
249
LCP
 Local Convergence Point
250
LCS
 Line Code Signaling
251
IAG
 Interactive Advertising Guidelines
252
IAMS
 Intelligent Asset Management System
253
HDT
 Host Digital Terminal
254
HDTV
 High Definition Television
255
HIT
 Headend Interface Terminal
256
CSH
 Central Switch Homerun
257
CLI
 Command Line Interface
258
CLR
 Common Language Run-time
259
ARIB
 Association of Radio Industries and Businesses
260
ARIN
 American Registry of Internet Numbers
261
PON
 Passive Optical Network
262
POS
 Packet Over SONET
263
PSP
 Packet Streaming Protocol
264
PSQ
 Packet Streaming Queue
265
PTS
 Program Transport Stream
266
PVC
 Permanent Virtual Circuit
267
RIN
 Relative Intensity Noise
268
RIP
 Routing Information Protocol
269
SPE
 Synchronous Payload Envelope
270
SPM
 Self phase modulation
271
STG
 Subscriber Telephony Gateway
272
TRP
 Target Rating Points
273
TSI
 Time Slot Interchange
274
VCR
 Video Cassette Recorder
275
VDC
 Volts Direct Current
276
WLAN
 Wireless Local Area Network
277
WME
 Wireless Media Extension
278
PSI
 Program Specific Information
279
PSIP
 Program and System Information Protocol
280
RFP
 Request for Proposal
281
RIAA
 Recording Industry Association of America
282
SAW
 Surface Acoustic Wave
283
SBC
 Switched Broadcast Client
284
SBM
 Switched Broadcast Manager
285
SNMP
 Simple Network Management Protocol
286
SOA
 Semiconductor Optical Amplifier
287
SOAP
 Simple Object Access Protocol
288
TNCS
 Transmission Network Control System
289
TRI
 Telephony Return Interface
290
VCI
 Virtual Channel Identifier
291
VCM
 Variable Coding and Modulation
292
IPAT
Internet Protocol Access Terminal
293
IPDR
 Internet Protocol Detail Record
294
IPDT
 Internet Protocol Digital Terminal
295
HSS
 Home Subscriber Server
296
HTPC
 Home Theatre Personal Computer
297
GSRM
 Global System Resource Manager
298
GUI
 Graphical User Interface
299
GVRP
 GARP VLAN Registration Protocol
300
FCC
 Federal Communications Commission
301
FCP
 Fiber Channel Protocol
302
EPL
 Ethernet Private Line
303
CSCF
 Call State Control Function
304
DLNA
 Digital Living Network Alliance
305
CPD
 Common Path Distortion
306
DAC
 Digital Addressable Controller
307
DARPA
 Defense Advanced Research Projects Agency
308
CLE
 Customer Located Equipment
309
CLEC
 Competitive Local Exchange Carrier
310
CCI
 Content Control Information
311
CCK
 Complimentary Code Keying
312
ARCNET
 Attached Resource Computer Network
313
ARF
 Advertising Research Foundation
314
PBX
 Private Branch Exchange
315
PCI
 Peripheral Connect Interface
316
PCR
 Program Clock Reference
317
PRM
 Polarization Recovery Module
318
PRNG
 Pseudo Random Number Generators
319
RFC
 Request for Comment
320
SAP
 Service Access Point
321
SARA
 Scientific-Atlanta Resident Application
322
SATA
 Serial Advanced Technology Attachment
323
SCP
 Service Control Platform
324
SCR
 Silicon Controlled Rectifier
325
SCSI
 Small Computer System Interface
326
SHDB
 Switched High-definition Digital Broadcast
327
SIC
 Standard Industrial Classification
328
TELR
 Talker Echo Loudness Rating
329
TKIP
 Temporal Key Integrity Protocol
330
VBR
 Variable Bit Rate
331
VCAT
 Virtual Concatenation
332
VSAT
 Very Small Aperture Terminal
333
VTS
 Video Transport Service
334
HSD
 High Speed Data
335
HSDPA
 High Speed Downlink Packet Access
336
HSI
 High-Speed Internet
337
GPS
 Global Positioning Satellite
338
GRE
 Generic Routing Encapsulation
339
GRM
 Global Resource Manager
340
EIR
 Excess Information Rate
341
EMI
 Electro-Magnetic Interference
342
DRAM
 Dynamic Random-Access Memory
343
DRM
 Digital Rights Management
344
DSA
 Dynamic Service Addition
345
DHWG
 Digital Home Working Group
346
DLCI
 Data Link Connection Identifier
347
DLL
 Data Link Layer
348
CBT
 Computer Based Testing (or Training)
349
CCDF
 Complementary Cumulative Distribution Function
350
API
 Application Programming Interface
351
APSK
 Amplitude Phase Shift Keying
352
VAG
 Voice Access Gateway
353
VBI
 Vertical Blanking Interval
354
RTSP
 Real Time Streaming Protocol
355
SAG
 Synthetic Analog Gateway
356
SAN
 Storage Area Network
357
PRBS
 Pseudo-Random Binary Sequence
358
PRI
 Primary Rate Interface
359
PBIA
 Personal Broadband Industry Association
360
PBP
 Personal Basis Profile
361
PBR
 Policy Based Routing
362
NID
 Network Interface Device
363
NIS
 Network Infrastructure Solutions
364
MSC
 Mobile Switching Center
365
MSPP
 Multi-Service Provisioning Platform
366
MTA
 Multimedia Terminal Adapter
367
MVNO
 Mobile Virtual Network Operator
368
MDU
 Multiple Dwelling Unit
369
MEMS
 Micro-Electro-Mechanical Systems
370
LMP
 Link Management Protocol
371
LOS
 Loss of Signal
372
LPCM
 Linear Pulse Code Modulation
373
OSC
 Optical Supervisory Channel
374
OSI
 Open Systems Interconnect
375
NTSC
 National Television System Committee
376
NEMA
 National Electrical Manufactures Association
377
NEMS
 Network Element Management System
378
NGNA
 Next Generation Network Architecture
379
MPLS
 Multi Protocol Label Switching
380
MPTS
 Multiple Program Transport Stream
381
MSB
 Most Significant Byte
382
MDA
 Model Driven Architecture
383
MDR
 Mobile Digital Recorder
384
LMDS
 Local Multipoint Distribution Service
385
LMI
 Link Management Interface
386
LATA
 Local Access and Transport Area
387
LCAS
 Link Capacity Adjustment Scheme
388
NDVR
 Network Digital Video Recording
389
NEBS
 Network Equipment Building System
390
LED
 Light Emitting Diode
391
LLC
 Logical Link Control
392
ISTP
 Internet Signaling Transport Protocol
393
HPNA
 Home Phoneline Networking Alliance
394
HPOV
 Hewlett Packard Open View
395
HQ
 High Quality
396
HSA
 High Speed Access
397
FSN
 Full Service Network
398
FSO
 Free Space Optical
399
FTP
 File Transfer Protocol
400
EDGE
 Enhanced Data-Rates for Global Evolution
401
EIA
 Electronics Industry Association
402
DFB
 Distributed Feedback
403
DHCP
 Dynamic Host Configuration Protocol
404
DHEI
 Digi-Cable Headend Expansion Interface
405
CATV
 Community Antenna Television
406
CBR
Constant Bit Rate
407
ADSL
 Asymmetric Digital Subscriber Line
408
AES
 Advanced Encryption Standard
409
OMG
 Object Management Group
410
ONDS
 Optical Node Distribution Switch
411
ONT
 Optical Network Termination
412
PESQ
 Perceptual Evaluation of Speech Quality
413
PHS
 Payload Header Suppression
414
RTP
 Real-time Transport Protocol
415
RTPS
 Real Time Polling Service
416
SCMS
 Serial Copy Management System
417
SCO
 Synchronous Connection Oriented
418
SES
 Severely Errored Seconds
419
SGC
 Signaling Gateway Controller
420
UTI
 Universal Transport Interface
421
UTP
 Unshielded Twisted Pair-Cable
422
VAD
 Voice Activity Detection
423
WECA
 Wireless Ethernet Compatibility Alliance
424
WEP
 Wired Equivalent Privacy
425
AOD
 Advertising On Demand
426
APD
 Avalanche Photo Diode
427
PPT
 Power Passing Tap
428
PPTP
 Point-to-Point Tunneling Protocol
429
RCA
 Root Cause Analysis
430
RDI
 Remote Defect Indicator
431
ROI
 Return on Investment
432
RTN
 Regional Transport Network
433
RTOS
 Real Time Operating System
434
SCM
 Stored Content Manager
435
SDVOD
 Standard Definition Video-on-Demand
436
RPD
 Return Path Demodulator
437
RPM
 Revolutions Per Minute
438
PPD
 Post-pickup Delay
439
PPP
 Point-to-Point Protocol
440
SMTP
 Simple Mail Transfer Protocol
441
SNG
Satellite News Gathering
442
TDM
 Time Division Multiplexing
443
TEC
Triggered Event Command
444
VRTX
 Virtual Real-Time Extension
445
SBS
 Switched Broadcast Server
446
SBV
 Switched Broadcast Video
447
VSA
 Vector Signal Analyzer
448
USF
 Universal Service Fund
449
USM
 User-based Security Model
450
SDRAM
 Synchronous Direct Random-Access Memory
451
SDTV
 Standard Definition Television
452
RPR
 Resilient Packet Ring
453
RTI
 Real Time Ingest
454
PSQM
 Perceptual Speech Quality Measurement
455
PSTN
Public Switched Telephone Network
456
CWDM
 Coarse Wavelength Division Multiplexing
457
CWM
 Common Warehouse Metamodel
458
CLDC
 Connection Limited Device Configuration
459
TIA
 Telecommunications Industry Association
460
ACM
 Adaptive Coding and Modulation
461
DENI
 Digital Entertainment Networking Initiative
462
DES
 Data Encryption Standard
463
DFAST
 Dynamic Feedback Arrangement Scrambling Technique
464
ADI
 Asynchronous Digital Interface
465
MIRS
 Motorola Integrated Radio system
466
MTS
 Mobile Telephone Service
467
ANF
 Aggregate Noise Factor
468
ANSI
 American National Standards Institute
469
CALEA
 Communications Assistance for Law Enforcement Act
470
ISMS
 Integrated Service Management System
471
ISO
 International Organization for Standardization
472
LEC
 Local Exchange Carrier
473
LVI
 Low Voltage Integrator
474
MAC
 Media Access Control
475
MCTF
 Motion Compensated Temporal Filtering
476
MMI
 Man Machine Interface
477
MPC
 Media Player Controller
478
NDE
 Network Dimensioning Engine
479
NDMH
 Non-Degraded Modem Hours
480
NRSS
 National Renewable Security Standard
481
NSI
 Network Side Interface
482
NTS
 Near Term Storage
483
OCSP
 Online Certificate Status Protocol
484
OCST
 Office of Cable Signal Theft
485
PMT
 Program Map Table
486
POD
 Point of Deployment
487
OSNR
 Optical Signal-to-Noise Ratio
488
OSPF
 Open Shortest Path First
489
OSS
 Operational Support System
490
OLT
 Optical Line Terminal
491
OMA
 Open Mobile Alliance
492
ISV
 Independent Software Vendor
493
ITA
 Interactive Television Association
494
FLR
 Frame Loss Ratio
495
FOSC
 Fiber Optic Splice Closure
496
EDC
 Electronic Dispersion Compensator
497
EDFA
 Erbium Doped Fiber Amplifier
498
DPON
 Deep-fiber Passive Optical Network
499
DPSK
 Differential Phase Shift Keying
500
DPT
 Dynamic Packet Transport
501
SCH
 Synchronization Channel
502
SDMA
 Spatial Division Multiple Access
503
MC
 Message Center
504
MCS
 Multi Carrier Mode
505
BTS
 Base Transceiver Station
506
DAMPS
 Digital Advance Mobile Phone Service
507
DTMF
 Dual Tone Multiple Frequency
508
EIRP
 Equivalent Isotropic Radiated Power
509
ESMR
 Enhanced Specialized Mobile Radio
510
EVPL
 Ethernet Virtual Private Line
511
FBI
 Federal Bureau of Investigation
512
ATDMA
 Asynchronous Time Division Multiple Access
513
ARP
 Address Resolution Protocol
514
DVD
 Digital Versatile Disc
515
DVI
 Display Visual Interface
516
EVC
 Ethernet Virtual Circuit
517
EVM
 Error Vector Magnitude
518
FEC
 Forwarding Equivalence Class
519
FHCS
 Fragment Header Check Sequence
520
HDLC
 High-Level Data Link Control
521
HDMI
 High Definition Multimedia Interface
522
ILEC
 Incumbent Local Exchange Carrier
523
IMD
 Inter-Modulation Distortion
524
INA
 Interactive Network Adaptor
525
ISA
 Industry Standard Architecture
526
ISDN
 Integrated Services Digital Network
527
ISM
 Industrial Scientific Medical
528
IVR
 Interactive Voice Response
529
KDCF
 Korea Digital Cable Forum
530
LTS
 Long Term Storage
531
NAT
 Network Address Translation
532
NDA
 Non-Disclosure Agreement
533
NOC
 Network Operations Center
534
NPR
 Noise Power Ratio
535
OUI
 Organizationally Unique Identifier
536
PAT
 Program Association Table
537
OFC
 Optical Fiber Communication
538
PLT
 Power-Line Telecommunications
539
PMD
 Polarization Mode Dispersion
540
PCS
 Personal Communications System
541
IRR
 Internal Rate of Return
542
LSP
 Label Switched Path
543
LSR
 Label Switch Router
544
MHP
 Multimedia Home Platform
545
MIB
 Management Information Base
546
MIDP
 Mobile Information Device Profile
547
NMS
 Network Management System
548
PDA
 Personal Digital Assistant
549
PDW
 Polarization Dependent Wavelength
550
OTDR
 Optical Time Domain Reflectometer
551
OTN
 Optical Transition Node
552
NVM
 Non-Volatile Memory
553
NNOC
 National Network Operations Center
554
NNTP
 Network News Transfer Protocol
555
LDAP
 Lightweight Directory Access Protocol
556
LDP
 Label Distribution Protocol
557
MEN
 Metro Ethernet Network
558
NAPT
 Network Address and Protocol Translation
559
NAS
 Network Attached Storage
560
OEPLAN
 Optical Ethernet Private Local Area Network
561
OEVPL
 Optical Ethernet Virtual Private Line
562
NIU
 Network Interface Unit
563
MER
 Modulation Error Ratio
564
MGC
 Media Gateway Controller
565
LDPC
 Low Density Parity Check
566
LDS
 Local Digital Switch
567
IGMP
 Internet Group Multicast Protocol
568
IGP
 Interior Gateway Protocol
569
IKE
 Internet Key Exchange
570
HMS
 Headend Management System
571
HOM
 High-Order Modulation
572
FDDI
 Fiber Distributed Data Interface
573
FEC
 Forward Error Correction
574
ESC
 Embedded Signaling Channel
575
ESP
 Encapsulating Security Payload
576
ETSI
 European Telecommunications Standards Institute
577
DUT
 Device Under Test
578
DVB
 Digital Video Broadcast
579
ASTD
 American Society for Training and Development
580
ATA
 Advanced Technology Attachment
581
ABSBH
 Average Busy Season Busy Hour
582
ACAP
 Advanced Common Application Platform
583
ACL
 Access Control List
584
ACC
 Analog Control Channel
585
APN
 Access Point Name
586
SATCOM
 Satellite Communications
587
TACS
 Total Access Communications Systems
588
A/D
 Analog to Digital
589
A/V
 Audio/Video
590
AGC
 Automatic Gain Control
591
AIS
 Alarm Indication Signal
592
DCS
 Digital Cross-connect System
593
DCT
 Digital Communications (Cable) Terminal
594
DTCP
 Digital Transmission Content Protection
595
DUN
 Dial-Up Networking
596
ERIM
 Erasmus Research Institute of Management
597
ERM
 Edge Resource Manager
598
IDS
 Intrusion Detection System
599
IDT
 Integrated Digital Terminal
600
IEC
 International Electrotechnical Commission
601
HDCP
 High-bandwidth Digital Content Protection
602
HDD
 Hard Disk Drive
603
ITU
 International Telecommunications Union
604
IUC
 Interval Usage Code
605
AMA
 Automatic Message Accounting
606
AAC
 Advanced Audio Codec
607
IPMP
 Intellectual Property Management and Protection
608
DML
 Data Manipulation Language
609
AACS
 Advanced Access Content System
610
IPG
 Interactive Program Guide
611
IANA
 Internet Assigned Numbers Authority
612
ICB
 Independent Customer Builds
613
GWC
 Gate-Way Controller
614
HAN
 Home Area Network
615
HCRP
 Hard Copy Cable Replacement
616
IF
 Intermediate Frequency
617
IFC
 Initial First Cost
618
NASA
 National Aeronautics and Space Agency
619
ROW
 Return Order Wire
620
BW
 Bandwidth
621
DCME
 Digital Compressed Multiplication Equipment
622
BER
 Bit Error Rate
623
ETACS
 Extended TACS
624
IP
 Internet Protocol
625
MIN
 Mobile Identification Number
626
TDD
 Time Division Duplex
627
TFT
 Thin Film Transistor
628
HCS
 Header Check Sequence
629
HD
 High Definition
630
HDBH
 High-Day Busy Hour
631
MTNL
 Mahanagar Telephone Nigam limited
632
BSNL
 Bhrat Snchar Nigm Limited
633
NTSC
 National Television Standards Committee
634
NICNET
 National Informatics Centre Network
635
LBS
 Location-Based Services
636
LCD
 Liquid Crystal Display
637
LMR
 Land Mobile Radio
638
GMSK
 Gaussian Minimum Shift Keying
639
IC
 Integrated Circuit
640
GSN
 GPRS Support Node
641
OC
 Optical Carrier
642
PPDN
 Public Packet Data Network
643
IPTA
 Internet Protocol Transport Agreement
644
DPI
 Digital Program Insertion
645
ICO
 Incumbent Cable Operator
646
IDE
 Integrated Device Electronics
647
IDEN
 Integrated Dispatch Enhanced Network
648
IMEI
 International Mobile Equipment Identity
649
IPTV
 Internet Protocol Television
650
ICMP
 Internet Control Message Protocol
651
DNS
 Domain Name System
652
ETDMA
 Extended Time Division Multiple Access
653
DNCS
 Digital Network Control System
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