700+ Wireless Networking Abbreviations

wireless abbreviations tech hyme

Of all the communications services available today, wireless services are having the most dramatic impact on our personal and professional lives, enhancing personal productivity, mobility, and security.

The wireless industry worldwide is experiencing rapid innovation, increased competition, and diversity in service offerings—all of which have resulted in lower prices for consumers and businesses.

Wireless technologies and services have become so popular worldwide and sufficiently sophisticated and complex as to merit dozens of articles on the topic that are published every year. This encyclopedia is a quick reference that clearly shows the essential concepts of wireless, including services, applications, protocols, network methods, development tools, administration and management, standards, and regulation.

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The information contained in this article, especially as it relates to specific vendors and products, is believed to be accurate at the time it was written and is, of course, subject to change with continued advancements in technology and shifts in market forces.

S.No. Name Full Name
1 AAL ATM Adaptation Layer
2 AAS Automated Auction System
3 ABATS Automated Bit Access Test System
4 ABM Accunet Bandwidth Manager (AT&T)
5 ABR Available Bit Rate
6 AC Access Control
7 AC Address Copied
8 ac Alternating Current
9 AC Authentication Center
10 ACD Automatic Call Distributor
11 ACELP Algebraic Code Excited Linear Predictive
12 ACP Access Control Point
13 ACL Access Control List
14 ACL Asynchronous Connectionless Link
15 ACS Asynchronous Communications Server
16 ACTS Advanced Communication Technology Satellite (NASA)
17 ADA Americans with Disabilities Act
18 ADCR Alternate Destination Call Routing (AT&T)
19 ADM Add-Drop Multiplexer
20 ADN Advanced Digital Network (Pacific Bell)
21 ADPCM Adaptive Differential Pulse Code Modulation
22 ADSL Asymmetric Digital Subscriber Line
23 AES Advanced Encryption Algorithm
24 AFP Apple File Protocol
25 AGC Automatic Gain Control
26 Aglet Agent Applet (IBM Corp.)
27 AGRAS Air-Ground Radiotelephone Automated Service
28 AIOD Automatic Identification of Outward Dialed Calls
29 AIN Advanced Intelligent Network
30 ALI Automatic Location Identification or Information
31 ALM Antilocking Mechanism
32 AM Amplitude Modulation
33 AMPS Advanced Mobile Phone Service
34 AMTS Automated Marine Telecommunications System
35 ANI Automatic Number Identification
36 ANR Automatic Network Routing (IBM Corp.)
37 ANSI American National Standards Institute
38 ANT ADSL Network Terminator
39 AOL America Online
40 AP Access Point
41 APC Access Protection Capability (AT&T)
42 API Application Programming Interface
43 APPC Advanced Program-to-Program Communications (IBM Corp.)
44 APPN Advanced Peer-to-Peer Network (IBM Corp.)
45 APS Automatic Protection Switching
46 ARCnet Attached Resource Computer Network (Datapoint Corp.)
47 ARB Adaptive Rate Based (IBM Corp.)
48 ARIB Association of Radio Industries and Businesses (Japan)
49 ARP Address Resolution Protocol
50 ARPA Advanced Research Projects Agency
51 ARQ Automatic Repeat Request
52 ARS Action Request System (Remedy Systems, Inc.)
53 AS Autonomous System
54 ASCII American Standard Code for Information Interchange
55 ASIC Application-Specific Integrated Circuit
56 ASN.1 Abstract Syntax Notation 1
57 ASTN Alternate Signaling Transport Network (AT&T)
58 AT&T American Telephone & Telegraph
59 ATDMA Asynchronous Time Division Multiplexing Access
60 ATIS Alliance for Telecommunications Industry Solutions (formerly, ECSA)
61 ATM Asynchronous Transfer Mode
62 ATM Automated Teller Machine
63 ATSC Advanced Television Systems Committee
64 ATT Auction Tracking Tool
65 AUI Attachment Unit Interface
66 AVM Administrative View Module
67 AWG American Wire Gauge
68 AWT Abstract Window Toolkit
69 B8ZS Binary Eight Zero Substitution
70 BACP Bandwidth Allocation Control Protocol
71 BBS Bulletin Board System
72 BCCH Broadcast Control Channel
73 BDCS Broadband Digital Cross-Connect System
74 BECN Backward Explicit Congestion Notification
75 Bellcore Bell Communications Research, Inc.
76 BER Bit Error Rate
77 BERT Bit Error Rate Tester
78 BETRS Basic Exchange Telephone Radio Service
79 BFT Binary File Transfer
80 BGP Border Gateway Protocol
81 BHCA Busy Hour Call Attempt
82 BHCR Busy Hour Call Rate
83 BIB Backward Indicator Bit
84 BIOS Basic Input-Output System
85 BMC Block Multiplexer Channel (IBM Corp.)
86 BMS-E Bandwidth Management Service–Extended (AT&T)
87 BOC Bell Operating Company
88 BONDING Bandwidth on Demand Interoperability Group
89 BootP Boot Protocol
90 BPDU Bridge Protocol Data Unit
91 BPS Bits per Second
92 BPV Bipolar Violation
93 BREW Binary Runtime Environment for Wireless (Qualcomm)
94 BRI Basic Rate Interface (ISDN)
95 BSA Basis Serving Arrangement
96 BSC Base Station Controller
97 BSC Binary Synchronous Communications
98 BSE Basic Service Element
99 BSN Backward Sequence Number
100 BSSC Base Station System Controller
101 BST Base Station Transceiver
102 BT Both-Way Trunk
103 BTA Business Trading Area
104 BTS Base Transceiver Station
105 CA Communications Assistant
106 CAD Computer-Aided Design
107 CAI Common Air Interface
108 CAM Computer-Aided Manufacturing
109 CAN Campus Area Network
110 CAP Carrierless Amplitude/Phase (Modulation)
111 CAP Competitive Access Provider
112 CARS Cable Antenna Relay Services
113 CAS Customer Activation System
114 CASE Computer-Aided Software Engineering
115 CAT Computed Axial Tomography
116 CATV Cable Television
117 CB Cell Broadcast
118 CB Citizens’ Band
119 CBR Constant Bit Rate
120 CBSC Centralized Base Site Controller
121 CCC Clear Channel Capability
122 CCCH Common Control Channel
123 CCF Call Control Function
124 CCITT Consultative Committee for International Telegraphy and Telephony
125 CCR Customer-Controlled Reconfiguration
126 CCS Common Channel Signaling
127 CCSNC Common Channel Signaling Network Controller
128 CCSS 6 Common Channel Signaling System 6
129 CD Compact Disc
130 CD-R Compact Disc–Recordable
131 CD-ROM Compact Disc–Read Only Memory
132 CDCS Continuous Dynamic Channel Selection
133 CDDI Copper Distributed Data Interface
134 CDG CDMA Development Group
135 CDMA Code Division Multiple Access
136 CDMP Cellular Digital Messaging Protocol
137 CDO Community Dial Office
138 CDPD Cellular Digital Packet Data
139 CDR Call Detail Record or Recording
140 CEA Component Economic Area
141 CEI Comparably Efficient Interconnection
142 Centrex Central Office Exchange
143 CEP Circular Error Probable
144 CEPT Conference of European Posts and Telegraphs
145 CGI Common Gateway Interface
146 CGSA Cellular Geographic Services Area
147 CHAP Challenge Handshake Authentication Protocol
148 CIF Common Intermediate Format
149 CIM Common Information Model
150 CIMD Computer Interface to Message Distribution (Nokia Telecommunications)
151 CIR Committed Information Rate
152 CLAN Cordless Local Area Network
153 CLASS Custom Local Area Signaling Services
154 CLEC Competitive Local Exchange Carrier
155 CLI Calling Line Identification
156 CLNP Connectionless Network Protocol
157 CLP Cell Loss Priority
158 CM-ES Circuit-Switched Mobile-End System
159 CMD-IS Circuit-Switched Mobile Data Intermediate System
160 CMI Cable Microcell Integrator
161 CMIP Common Management Information Protocol
162 CMIS Common Management Information Services
163 CMRS Commercial Mobile Radio Service
164 CNCS Clearlink Network Control System (AT&T Tridom)
165 CNIR Calling Number Identification Presentation
166 CNR Customer Network Reconfiguration
167 CNS Complementary Network Service
168 CO Central Office
169 COM Component Object Model (Microsoft Corp.)
170 COMSAT Communications Satellite Corp.
171 CON Concentrator
172 CORBA Common Object Request Broker Architecture
173 CoS Class of Service
174 COT Central Office Terminal
175 CP Coordination Processor
176 CPE Customer Premises Equipment
177 CPODA Contention, Priority-Oriented Demand Allocation
178 CPS Cycles per Second (Hertz)
179 CPU Central Processing Unit
180 CR Carriage Return
181 CRC Cyclic Redundancy Check
182 CRM Cisco Resource Manager (Cisco Systems)
183 CRM Customer Relationship Management
184 CS Cell Station
185 CS-CDPD Circuit-Switched Cellular Digital Packet Data
186 CSA Carrier Serving Area
187 CSACELP Conjugate Structure Algebraic Code Excited Linear Prediction
188 CSC Circuit-Switched Cellular
189 CSCCP Circuit-Switched CDPD Control Protocol
190 CSD Circuit-Switched Data
191 CSM Communications Services Management
192 CSMA/CA Carrier Sense Multiple Access with Collision Avoidance
193 CSMA/CD Carrier Sense Multiple Access with Collision Detection
194 CSR Customer Service Representative
195 CSU Channel Service Unit
196 CT Cordless Telecommunications
197 CTI Computer-Telephony Integration
198 CUG Closed User Groups
199 CVSD Continuously Variable Slope Delta (Modulation)
200 D-AMPS Digital Advanced Mobile Phone Service
201 DA Destination Address
202 DAC Digital-to-Analog Converter
203 DACS Digital Access and Cross-Connect System (AT&T)
204 DAP Demand Access Protocol
205 DAS Dual Attached Station
206 DASD Direct Access Storage Device (IBM Corp.)
207 DAT Digital Audio Tape
208 dB Decibel
209 DBMS Database Management System
210 DBS Direct Broadcast Satellite
211 DBU Dial Backup Unit
212 dc Direct Current
213 DCC Digital Control Channel
214 DCCH Digital Control Channel
215 DCE Data Communications Equipment
216 DCE Distributed Computing Environment
217 DCF Data Communication Function
218 DCS Digital Cross-Connect System
219 DDF Digital Data Fast (Motorola)
220 DDS Digital Data Services
221 DDS/SC Digital Data Service with Secondary Channel
222 D/E Debt-Equity (Ratio)
223 DECT Digital Enhanced (formerly, European) Cordless Telecommunication
224 DES Data Encryption Standard
225 DFSMS Data Facility Storage Management Subsystem (IBM Corp.)
226 DHCP Dynamic Host Configuration Protocol
227 DID Direct Inward Dialing
228 DIF Digital Interface Frame
229 DISCO Domestic and International Satellite Consolidation Orders (FCC)
230 DLCS Digital Loop Carrier System
231 DLL Data Link Layer
232 DLL Dynamic Link Library (Microsoft Corp.)
233 DLSw Data Link Switching (IBM Corp.)
234 DLU Digital Line Unit
235 DM Distributed Management
236 DME Distributed Management Environment
237 DMI Desktop Management Interface
238 DMT Discrete Multitone
239 DMTF Desktop Management Task Force
240 DNS Domain Name Service
241 DoD Department of Defense (U.S.)
242 DOD Direct Outward Dialing
243 DOS Disk Operating System
244 DOT Department of Transportation (U.S.)
245 DOV Data over Voice
246 DQDB Distributed Queue Dual Bus
247 DQPSK Differential Quadrature Phase-Shift Keying
248 DRAM Dynamic Random Access Memory
249 DS0 Digital Signal–Level 0 (64 kbps)
250 DS1 Digital Signal–Level 1 (1.544 Mbps)
251 DS1C Digital Signal–Level 1C (3.152 Mbps)
252 DS2 Digital Signal–Level 2 (6.312 Mbps)
253 DS3 Digital Signal–Level 3 (44.736 Mbps)
254 DS4 Digital Signal–Level 4 (274.176 Mbps)
255 DSI Digital Speech Interpolation
256 DSL Digital Subscriber Line
257 DSMA Digital Sense Multiple Access
258 DSN Defense Switched Network
259 DSP Digital Signal Processor
260 DSS Decision Support System
261 DSSS Direct Sequence Spread Spectrum
262 DSU Data Service Unit
263 DSX1 Digital Systems Cross-Connect 1
264 DTE Data Terminal Equipment
265 DTMF Dual Tone Multifrequency
266 DTR Dedicated Token Ring
267 DTU Data Transfer Unit
268 DTV Digital Television
269 DTX Discontinuous Transmission
270 DWMT Discrete Wavelet Multitone
271 DXI Data Exchange Interface
272 E-AMPS Enhanced Advanced Mobile Phone Service
273 E-Mail Electronic Mail
274 E-TDMA Expanded Time Division Multiple Access
275 ECC Enterprise Command Center (Bay Networks)
276 ECG Electrocardiogram
277 ECSA Exchange Carriers Stndards Association
278 ED Ending Delimiter
279 EDGE Enhanced Data Rates for Global Evolution
280 EDI Electronic Data Interchange
281 EDRO Enhanced Diversity Routing Option (AT&T)
282 EEPROM Electronically Erasable Programmable Read-Only Memory
283 EEROM Electronically Erasable Read-Only Memory
284 EFRC Enhanced Full Rate Codec
285 EFT Electronic Funds Transfer
286 EGP External Gateway Protocol
287 EHF Extremely High Frequency (More than 30 GHz)
288 EIA Electronic Industries Association
289 EIR Equipment Identity Register
290 EISA Extended Industry Standard Architecture
291 EMA Electronic Messaging Association
292 EMBARC Electronic Mail Broadcast to a Roaming Computer
293 EMI Electromechanical Inteference
294 EMS Element Management System
295 EOC Embedded Overhead Channel
296 EOT End of Transmission
297 EP Extension Point
298 EPFD Equivalent Power Flux Density
299 ERMES Enhanced Radio Messaging System
300 ERP Effective Radiated Power
301 ERP Enterprise Resource Planning
302 ESCON Enterprise System Connection (IBM Corp.)
303 ESD Electronic Software Distribution
304 ESF Extended Super Frame
305 ESMR Enhanced Specialized Mobile Radio
306 ESMS Enhanced Short Message Service
307 ESMTP Extended Simple Mail Transfer Protocol
308 ESN Electronic Serial Number
309 ESQ End System Query
310 ETC Enhanced Cellular Throughput
311 ETSI European Telecommunication Standards Institute
312 EVRC Enhanced Variable Rate Coder
313 4GL Fourth-Generation Language
314 FA Foreign Agent
315 FACCH Fast Associated Control Channel
316 FASB Financial Accounting Standards Board
317 FASC Fraud Analysis and Surveillance Center (AT&T)
318 FAT File Allocation Table
319 FC Frame Control
320 FC Fibre Channel
321 FCC Federal Communications Commission (U.S.)
322 FCS Frame Check Sequence
323 FDDI Fiber Distributed Data Interface
324 FDIC Federal Deposit Insurance Corporation
325 FDL Facilities Data Link
326 FECN Forward Explicit Congestion Notification
327 FEP Front-End Processor
328 FHSS Frequency Hopping Spread Spectrum
329 FIB Forward Indicator Bit
330 FIB Forwarding Information Base
331 FIR Fast Infrared
332 FITL Fiber in the Loop
333 FM Frequency Modulation
334 FOCC Forward Control Channel
335 FOD Fax on Demand
336 FPF Fraud Protection Feature
337 FPGA Field Programmable Gate Array
338 FRAD Frame Relay Access Device
339 FRS Family Radio Service
340 FS Frame Status
341 FSN Forward Sequence Number
342 FSTN Film Super-Twisted Nematic
343 FTAM File Transfer, Access, and Management
344 FT1 Fractional T1
345 FTP File Transfer Protocol
346 FTS Federal Telecommunications System
347 FTTB Fiber to the Building
348 FTTC Fiber to the Curb
349 FTTH Fiber to the Home
350 FWA Fixed Wireless Access
351 FWT Fixed Wireless Terminal
352 FX Foreign Exchange (Line)
353 GAO General Accounting Office (U.S.)
354 GATT General Agreement on Tariffs and Trade
355 GCS Ground Control Station
356 GDS Generic Digital Services
357 GEO Geostationary Earth Orbit
358 GFC Generic Flow Control
359 GGSN Gateway GPRS Support Node
360 GHz Gigahertz (Billions of Cycles per Second)
361 GIS Geographic Information Systems
362 GMDSS Global Maritime Distress and Safety System
363 GMRS General Mobile Radio Service
364 GMSK Gaussian Minimum Shift Keying
365 GPI General Purpose Interface
366 GPRS General Packet Radio Services
367 GPS Global Positioning System
368 GSA General Services Administration
369 GSM Global System for Mobile Telecommunications
370 GUI Graphical User Interface
371 H0 High-Capacity ISDN Channel Operating at 384 kbps
372 H11 High-Capacity ISDN Channel Operating at 1.536 Mbps
373 HA Home Agent
374 HDLC High-Level Data Link Control
375 HDML Handheld Device Markup Language
376 HDSL High-Bit-Rate Digital Subscriber Line
377 HDTV High Definition Television
378 HEC Header Error Check
379 HF High Frequency (1.8–30 MHz)
380 HFC Hybrid Fiber/Coax
381 HIC Head-End Interface Converter
382 HLR Home Location Register
383 HMMP HyperMedia Management Protocol
384 HMMS HyperMedia Management Schema
385 HMOM HyperMedia Object Manager
386 HSCSD High-Speed Circuit-Switched Data
387 HTML HyperText Markup Language
388 HTTP HyperText Transfer Protocol
389 HVAC Heating, Ventilation, and Air Conditioning
390 Hz Hertz (Cycles per Second)
391 I/O Input-Output
392 IAB Internet Architecture Board
393 IANA Internet Assigned Numbers Authority
394 IAPP Inter Access Point Protocol
395 IC Integrated Circuit
396 IC Integrity Check
397 ICI Interexchange Carrier Interface
398 ICMP Internet Control Message Protocol
399 ICP Integrated Communications Provider
400 ICR Intelligent Call Routing
401 ICS Intelligent Calling System
402 ID Identification
403 IDDD International Direct Dialing Designator
404 iDEN Integrated Digital Enhanced Network
405 IDPR Inter-Domain Policy Routing
406 IEC International Electrotechnical Commission
407 IEEE Institute of Electrical and Electronic Engineers
408 IESG Internet Engineering Steering Group
409 IETF Internet Engineering Task Force
410 IF Intermediate Frequency
411 IGP Interior Gateway Protocol
412 IIG Intercast Industry Group
413 IIOP Internet Inter-ORB Protocol
414 ILEC Incumbent Local Exchange Carrier
415 IM Instant Messaging
416 IMAP Internet Mail Access Protocol
417 IMEI International Mobile Equipment Identity
418 IMO International Maritime Organization
419 IMS/VS Information Management System/Virtual Storage (IBM Corp.)
420 IMSI International Mobile Subscriber Identity
421 IMTS Improved Mobile Telephone Service
422 IN Intelligent Network
423 INMARSAT International Maritime Satellite Organization
424 INMS Integrated Network Management System
425 ITV Interactive Television
426 IOC Interoffice Channel
427 IP Internet Protocol
428 IPv4 Internet Protocol Version 4 (Current)
429 IPv6 Internet Protocol Version 6 (Future)
430 IPH Integrated Packet Handler
431 IPI Intelligent Peripheral Interface
432 IPN Intelligent Peripheral Node
433 IPsec Internet Protocol Secure
434 IPX Internet Packet Exchange
435 IR Infrared
436 IRAC Interdepartment Radio Advisory Committee
437 IRC Internet Relay Chat
438 IrDA Infrared Data Association
439 IrDA-SIR Infrared Data Association Serial Infrared (Standard)
440 IrFM Infrared Financial Messaging
441 IrLAN Infrared Local Area Network
442 IrLAP Infrared Link Access Protocol
443 IrLMP Infrared Link Management Protocol
444 IrPL Infrared Physical Layer
445 IrTTP Infrared Tiny Transport Protocol
446 IRQ Interrupt Request
447 IrTTP Infrared Transport Protocol
448 IS Information System
449 IS Industry Standard
450 IS-IS Intraautonomous System to Intraautonomous System
451 ISA Industry Standard Architecture
452 ISDL ISDN Subscriber Digital Line
453 ISDN Integrated Services Digital Network
454 ISM Industrial, Scientific, and Medical (Frequency Bands)
455 ISO International Organization for Standardization
456 ISOC Internet Society
457 ISP Internet Service Provider
458 ISSI Inter-Switching Systems Interface
459 IT Information Technology
460 ITFS Instructional Television Fixed Service
461 ITR Intelligent Text Retrieval
462 ITS Internet Telephony Server (Lucent Technologies)
463 ITU-TSS International Telecommunications Union–Telecommunications Standardization Sector (formerly CCITT)
464 IV Initialization Vector
465 IVDS Interactive Video and Data Service
466 IVR Interactive Voice Response
467 IXC Interexchange Carrier
468 J2ME Java 2 Micro Edition
469 JDBC Java Database Connectivity
470 JDC Japanese Digital Cellular
471 JDK Java Development Kit
472 JEPI Joint Electronic Payments Initiative
473 JIT Just in Time
474 JMAPI Java Management Application Programming Interface
475 JPEG Joint Photographic Experts Group
476 JTC Joint Technical Committee
477 JVM Java Virtual Machine
478 kB Kilobyte
479 KSU Key Service Unit
480 KTS Key Telephone System
481 kHz Kilohertz (Thousands of Cycles per Second)
482 L2F Layer 2 Forwarding
483 L2TP Layer 2 Tunneling Protocol
484 LAN Local Area Network
485 LAPB Link Access Procedure–Balanced
486 LAPD Link Access Procedure on the D-Channel
487 LAT Local Area Transport (Digital Equipment Corp.)
488 LATA Local Access and Transport Area
489 LBO Line Build Out
490 LCD Liquid-Crystal Display
491 LCN Local Channel Number
492 LCP Link Control Protocol
493 LD Laser Diode
494 LDAP Lightweight Directory Access Protocol
495 LDCELP Low Delay Code Excited Linear Prediction
496 LEC Local Exchange Carrier
497 LED Light-Emitting Diode
498 LEO Low Earth Orbit
499 LF Line Feed
500 LF Low Frequency (30–300 kHz)
501 LI Length Indicator
502 Li-Ion Lithium Ion
503 LLC Logical Link Control
504 LMDS Local Multipoint Distribution System
505 LMS Location and Monitoring Service
506 LNP Local Number Portability
507 LPFM Low-Power Frequency-Modulated
508 LPRS Low-Power Radio Service
509 LSI Large-Scale Integration
510 LSM Limited-Size Messaging
511 LTG Line Trunk Group
512 LU Logical Unit (IBM Corp.)
513 M-ES Mobile End System
514 MAC Media Access Control
515 MAC Moves, Adds, Changes
516 MAE Major Economic Area
517 MAN Metropolitan Area Network
518 MAPI Messaging Applications Programming Interface (Microsft Corp.)
519 MAU Multistation Access Unit
520 MB Megabyte
521 MD Mediation Device
522 MD-IS Mobile Data–Intermediate System
523 MDBS Mobile Database System
524 MDI Mobile Data Initiative
525 MDLP Mobile Data-Link Layer Protocol
526 MDS Multipoint Distribution Service
527 MEO Middle Earth Orbit
528 MES Master Earth Station
529 MF Mediation Function
530 MH Mobile Host
531 MHz Megahertz (Millions of Cycles per Second)
532 MIB Management Information Base
533 MIN Mobile Identification Number
534 MIPS Millions of Instructions per Second
535 MIS Management Information Services
536 MM Mobility Manager
537 MMDS Multichannel, Multipoint Distribution Service
538 MMS Maritime Mobile Service
539 MMS Multimedia Messaging Service
540 MNLP Mobile Network Location Protocol
541 MNRP Mobile Network Registration Protocol
542 MO Mobile Originating
543 Modem Modulation/demodulation
544 MPEG Moving Pictures Experts Group
545 MPLS Multiprotocol Label Switching
546 MPMLQ Multipulse Maximum Likelihood Quantization
547 MR Message Register
548 ms Millisecond (Thousandths of a Second)
549 MS Mobile Station
550 MSC Mobile Switching Center
551 MSG Message
552 MSRN Mobile Station Roaming Number
553 MSS Mobile Satellite Service
554 MT Mobile Terminating
555 MTBF Mean Time Between Failure
556 MTSO Mobile Telephone Switching Office
557 MTSO Mobile Transport Serving Office
558 MVC Multicast Virtual Circuit
559 MVDS Microwave Video Distribution System
560 MVDDS Multichannel Video Distribution and Data Service
561 MVPD Multichannel Video Program Distribution
562 mW Milliwatt
563 MXU Mobile Exchange Unit
564 N-AMPS Narrowband Advanced Mobile Phone Service
565 N-PCS Narrowband Personal Communications Service
566 NAM Numeric Assignment Module
567 NAP Network Access Point
568 NASA National Aeronautics and Space Administration (U.S.)
569 NAT Network Address Translation
570 NAVSTAR Navigation System with Timing and Ranging
571 NCC National Coordination Committee
572 NE Network Element
573 NEI Network Equipment Identifier
574 NetBIOS Network Basic Input-Output System
575 NFS Network File System (or Server)
576 NIC Network Interface Card
577 NiCd Nickel Cadmium
578 NIF Network Interconnect Facility (Metricom, Inc.)
579 NiMH Nickel-Metal Hydride
580 NIST National Institute of Standards and Technology
581 NIU Network Interface Unit
582 nm Nanometer
583 NM Network Manager
584 NMS Network Management System
585 NMT Nordic Mobile Telephone (Ericsson)
586 NOC Network Operations Center
587 NOS Network Operating System
588 NPCS Narrowband Personal Communication Services
589 NSA National Security Agency (U.S.)
590 NSF National Science Foundation (U.S.)
591 NTIA National Telecommunications and Information Administration (U.S.)
592 NTSC National Television Standards Committee
593 OAM Operations, Administration, Management
594 OAM&P Operations, Administration, Maintenance, and Provisioning
595 OBEX Object Exchange
596 OC Optical Carrier
597 OEM Original Equipment Manufacturer
598 OET Office of Engineering and Technology (FCC)
599 OFDM Orthogonal Frequency Division Multiplexing
600 OMC Operations and Maintenance Center
601 OS Operating System
602 OSI Open Systems Interconnection
603 OSPF Open Shortest Path First
604 PACS Personal Access Communications System
605 pACT Personal Air Communications Technology
606 PAP Password Authentication Protocol
607 PAT Port Address Translation
608 PBX Private Branch Exchange
609 PC Personal Computer
610 PCB Printed Circuit Board
611 PCH Paging Channel
612 PCM Pulse Code Modulation
613 PCMCIA Personal Computer Memory Card International Association
614 PCN Personal Communications Networks
615 PCS Personal Communications Services
616 PCT Private Communication Technology
617 PDA Personal Digital Assistant
618 PDBS pACT Database Station
619 PDIS pACT Data Intermediate System
620 PDN Packet Data Network
621 PDSN Packet Data Serving Node
622 PDU Payload Data Unit
623 PGP Pretty Good Privacy
624 PHS Personal Handyphone System
625 PHY Physical Layer
626 PIAF PHS Internet Access Forum (Japan)
627 PIM Personal Information Manager
628 PIN Personal Identification Number
629 PLMRS Private Land Mobile Radio Services
630 POCSAG Post Office Code Standardization Advisory Group
631 POP Point of Presence
632 POTS Plain Old Telephone Service
633 PPP Point-to-Point Protocol
634 PPS Packets per Second
635 PRI Primary Rate Interface (ISDN)
636 PSAP Public Safety Answering Point
637 PSN Packet Switched Network
638 PSTN Public Switched Telephone Network
639 PT Payload Type
640 PTT Post Telephone & Telegraph
641 PUC Public Utility Commission
642 PVC Permanent Virtual Circuit
643 PWT Personal Wireless Telecommunications
644 QA Quality Assurance
645 QoS Quality of Service
646 QPSK Quadrature Phase Shift Keying
647 RACH Random Access Channel
648 RAD Remote Antenna Driver
649 RADIUS Remote Authentication Dial-In User Service
650 RAM Random Access Memory
651 RASP Remote Antenna Signal Processor
652 RDSS Radio Determination Satellite Service
653 REAG Regional Economic Area Grouping
654 RECC Reverse Control Channel
655 RF Radiofrequency
656 RF Routing Field
657 RFI Radio frequency Interference
658 RIP Routing Information Protocol
659 RMON Remote Monitoring
660 ROI Return on Investment
661 RRM Radio Resource Management
662 RSS Residential Service System (Nortel)
663 RT Remote Terminal
664 RTCMSC Radio Technical Commission for Maritime Services Special Committee
665 RX Receive
666 SA Source Address
667 SACCH Slow Associated Control Channel
668 SAN Satellite Access Node
669 SC System Controller
670 SCC Satellite Control Center
671 SCF Service Control Function
672 SCO Synchronous Connection Oriented
673 SD Starting Delimiter
674 SDF Service Data Function
675 SDSL Symmetric Digital Subscriber Line
676 SET Secure Electronic Transaction
677 SFD Start Frame Delimiter
678 SHF Super High Frequency (3–30 GHz)
679 SHVIA Satellite Home viewer VS Improvement
680 SHTTP Secure HyperText Transfer Protocol
681 SIG Special Interest Group
682 SID System Identification
683 SSID Service Set Identifier
684 SIM Subscriber Identification Module
685 SMR Specialized Mobile Radio
686 SMS Service Management System
687 SMS Short Message Service
688 SMS-SC Short Message Service Service Center
689 SMS/CB Short Message Service/Cell Broadcast
690 SMS/PP Short Message Service/Point-to-Point
691 SMTP Simple Mail Transfer Protocol
692 SNMP Simple Network Management Protocol
693 SOHO Small Office/Home Office
694 SOLAS Safety of Life at Sea
695 SQL Structured Query Language
696 SS Switching System
697 SS7 Signaling System No. 7
698 SSF Service Switching Function
699 SSL Secure Sockets Layer
700 T1 Transmission Service at the DS1 Rate of 1.544 Mbps
701 T3 Transmission Service at the DS3 Rate of 44.736 Mbps
702 TA Technical Advisor
703 TA Technical Advisory
704 TACS Total Access Communications System
705 TAP Telocator Alphanumeric Protocol
706 TASI Time Assigned Speech Interpolation
707 TB Terabyte (Trillion Bytes)
708 Tbps Terabits per Second
709 TCO Total Cost of Ownership
710 TCP Transmission Control Protocol
711 TDD Time Division Duplexing
712 TDM Time Division Multiplexer
713 TDMA Time Division Multiple Access
714 TDMA/TDD Time Division Multiple Access with Time Division Duplexing
715 TDOA Time Difference of Arrival
716 TDR Time Domain Reflectometer
717 TEM Transcend Enterprise Manager (3Com Corp.)
718 TFTP Trivial File Transfer Protocol
719 TIA Telecommunications Industry Association
720 TIB Tag Information Base
721 TMN Telecommunications Management Network
722 TNPP Telocator Network Paging Protocol
723 TV Television
724 TX Transmit
725 UAPROF User Agent Profile
726 UART Universal Asynchronous Receiver/Transmitter
727 UBR Unspecified Bit Rate
728 UDP User Datagram Protocol
729 UDP/IP User Datagram Protocol/Internet Protocol
730 UHF Ultra High Frequency (238 MHz to 1.3 GHz)
731 ULS Universal Licensing System
732 UMS Universal Messaging System
733 UMTS Universal Mobile Telephone Service
734 UMTS Universal Mobile Telecommunications System
735 UN United Nations
736 UNI User-Network Interface
737 UPS Uninterruptible Power Supply
738 URL Uniform Resource Locator
739 USAT Ultra Small Aperture Terminal
740 UTP Unshielded Twisted-Pair
741 UWB Ultra Wide Band
742 VC Virtual Circuit
743 VEC Volunteer Examiner-Coordinator
744 VF Voice Frequency
745 VFIR Very Fast Infrared
746 VHF Very High Frequency (50–146 MHz)
747 VLF Very Low Frequency (Less than 30 kHz)
748 VLR Visitor Location Register
749 VLSI Very Large Scale Integration
750 VOD Video on Demand
751 VPN Virtual Private Network
752 VSAT Very Small Aperture Terminal
753 W3C World Wide Web Consortium
754 WACS Wireless Access Communications System (Bellcore)
755 WAE Wireless Application Environment
756 WAN Wide Area Network
757 WAP Wireless Access Point
758 WAP Wireless Application Protocol
759 WASP Wireless Application Service Provider
760 WBM Web-Based Management
761 WCDMA Wideband Code Division Access Multiple
762 WCS Wireless Communications Service
763 WDCT Worldwide Digital Cordless Telephone
764 WECA Wireless Ethernet Compatibility
765 WEP Wired Equivalent Privacy
766 WFQ Weighted Fair Queuing (Cisco Systems)
767 WGS Worldwide Geodetic System
768 Wi-Fi Wireless Fidelity
769 WISP Wireless Internet Service Provider
770 WLAN Wireless Local Area Network
771 WLL Wireless Local Loop
772 WML Wireless Markup Language
773 WMTS Wireless Medical Telemetry Service
774 WPA Wireless Protected Access
775 WRC World Radio Conference
776 WSP Wireless Session Protocol
777 WTA Wireless Telephony Application
778 WTB Wireless Telecommunications Bureau
779 WWW World Wide Web
780 XOR Exclusive Or

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