Table of Contents


Index

Each term in the index is listed in full form, with the standard acronym or abbreviation immediately following. Note that Appendix A lists the same terms in alphabetical order, by acronym. The page number(s) in bold indicate the fullest definition(s) of each term, or the most significant treatment(s) of each subject.

1Base5, 231
10Base2, 51, 230
10Base5, 51, 230
10BaseT, 231, 236, 254
10Broadband36, 236
100BaseT, 236, 254, 255, 316
100VG-AnyLAN, 250, 253, 254, 255, 316
500, 148
800, 147
Digital, 203
802.1, 243, 253
802.2, 253, 256
802.3, 234, 253, 254
802.4, 253, 258
802.5, 234, 253
802.6, 253, 293, 295
802.7, 253
802.8, 253
802.9, 253
802.10, 253
802.11, 253, 333, 353
802.12, 253, 255
900/976, 148

A

AAL Type 1, 311
AAL Type 2, 311
AAL Type 3/4, 311
AAL Type 5, 312
Above 890 Decision, 456
Access Control Field, 299
Access Rate, 290
Adaptive Differential Pulse Code Modulation (ADPCM), 196
Address Field, 289
Address Field Extension (EA), 289
Adjunct Processor (AP), 322
Advanced Intelligent Network (AIN), 320
Architecture, 321
Futures, 325
Services, 323
Advanced Mobile Phone System (AMPS), 337, 347, 348, 351
Advanced Peer-to-Peer Networking (APPN), 250
Advanced Research Projects Agency Network (ARPANET), 35, 247, 249, 369
Alternative Access Vendor (AAV), see Competitive Access Provider
American National Standards Institute (ANSI), 131, 193, 253, 268, 269, 284 290
American Standard Code for Information Interchange (ASCII), 170
Amplifier, 23
Analog, 17
Archie, 388
Aspect Ratio, 403
Asymmetric Digital Microcell Link (ADML), 267
Asymmetric Digital Subscriber Line (ADSL), 262, 375
Asynchronous, 161, 166, 175
Asynchronous Transfer Mode (ATM), 86, 223, 245, 248, 250, 251, 257, 278, 292, 300, 302, 317, 413, 418, 432
Access, 305
ATM Reference Model, 309
Cell Structure, 307
LANs, 316
Protocols, 307
Quality of Service (QoS)
Standards, 304
Attached Resource Computer Network (ARCnet), 258
Attenuation, 22
ATM Forum, 304
ATM Layer, 310
ATM Reference Model, 309
Audiotex, 112
Authentication, 182, 393
Authorization, 183, 394
Automatic Call Distributor (ACD), 72, 79, 92
Automatic Route Selection (ARS), 78
Available Bit Rate (ABR), 311

B

Backward Explicit Congestion Notification (BECN), 289
Bandwidth, 16, 47, 51, 54, 58, 67, 406
Baseband LAN, 237
Baud, 17
Baudot, 169
Bellcore ,127, 265, 267, 268, 269, 294, 295, 321, 464
Bell Operating Company (BOC), 138
Bell Telephone Laboratories, 402
Binary File Transfer (BFT), 108
Binary Synchronous Communications (BSC), 176, 210
Bits Per Second (bps), 17
Bridge, 242, 297
Broadband, 17, 261
Broadband ISDN, 270, 278, 302, 303, 304, 316
Access, 317
Services, 317
Broadband LAN, 236
Broadband Switching System (BSS), 306, 307
Browser, 387
Bulletin Board System (BBS), 381
Burst Excess Size (Be), 289

C

Cable Distributed Data Interface (CDDI), 231, 232, 256
Call Blocking, 324
Call Completion Service, 324
Call Detail Recording (CDR), see Station Message Detail Recording
Call Pickup Service, 323
Caller Name, 324
Carrier, 16
Carrier Sense Multiple Access (CSMA), 234, 240, 253, 352
Carterphone, 133, 426, 456
CCIR, 131
CCITT, 131, 212
Cell Delay Variability (CDV), 313
Cell Error Ratio (CER), 313
Cell Loss Priority (CLP), 309
Cell Loss Ratio (CLR), 313
Cell Misinsertion Rate (CMR), 313
Cell Transfer Delay (CTD), 313
Cellular Radio, 346
Censorship, 441
Central Office, 129
Centrex, 87, 343
CERN, 385, 388
Channel, 11
Channel Bank, 199
Channel Service Unit (CSU), 163, 199
Chrominance, 404
Circuit, 10
Dedicated, 12, 145
Four-Wire, 15
Switched, 13
Two-Wire, 14
Virtual, 14
Circuit Digital Packet Data (CDPD), 351
Client/Server, 116, 247
Clipper, 392
Coaxial Cable, 50, 230, 402
Code Division Multiple Access, (CDMA), 339, 357
Codec, 25, 410,
Color-Space Conversion, 407
Command/Response (C/R), 289
Committed Burst Size (Bc), 289, 290
Committed Information Rate (CIR), 289, 290
Committed Rate Measurement Interval (Tc), 289
Common Air Interface (CAI), 345
Common Intermediate Format (CIF), 408
Common ISDN API (CAPI), 98
Communications Act of 1934, 455
Communications Act of 1962, 456
Communications Decency Act, 457, 463
Community Antenna TV (CATV), 239, 264, 376, 402, 410, 431, 433, 435, 457
Compaction Encoding, 407
Competition, 426
Competitive Access Provider (CAP), 141, 264, 375
Compression, 21, 175, 406, 409
Interframe, 407
Lossless, 406
Lossy, 406
Computer Emergency Response Team (CERT), 392, 395
Computer Security Service, 323
Computer Supported Telephony Applications (CSTA), 97
Computer Telephony Integration (CTI), 95
Concentrator, 276
Connectionless, 294
Connectionless Broadband Data Service (CBDS), 294
Connectionless Network Protocol (CLNP), 351
Connection-Oriented, 208, 295, 302
Consent Decree, 455
Constant Bit Rate (CBR), 311
Content, 443
Control Plane, 312
Convergence, 423
Convergence Sublayer (CS), 310
Cordless Telephony, 343
Cordless Telephony Generation 1 (CT1), 344
Cordless Telephony Generation 1+ (CT1+), 344
Cordless Telephony Generation 2 (CT2), 345
Cordless Telephony Generation 2+ (CT2+), 345
Cordless Telephony Generation 3 (CT3), 345
Customer Premise Equipment (CPE), 73, 306, 307
Cyclic Redundancy Check (CRC), 174, 208, 240

D

Data Communications Equipment (DCE), 156, 306
Data Encryption Standard (DES), 392
Data Exchange Interface (DXI), 297, 305
Data Line Connection Identifier (DLCI), 289
Data Private Facility (DPF), 392
Data Terminal Equipment (DTE), 156, 306
Datagram, 207
Defense Advanced Research Projects Agency Network (DARPANET), 367
Demand-Assigned Multiple Access (DAMA), 336
Demarcation Point, 137
Deregulation, 426
Differential Pulse Code Modulation (DPCM), 196
Digital, 19
Digital Access Cross-Connect System (DACS, DCCS), 201, 277
Digital Dataphone Service (DDS), 188, 248, 251, 284, 292
Digital European Cordless Telecommunications (DECT), 345, 354
Digital Loop Carrier (DLC), 277, 192
Digital Sense Multiple Access (DSMA), 352
Digital Service Unit (DSU), 164, 199, 291, 297
Digital Speech Interpolation (DSI), 196, 338
Digital Switched Access (DSA), see Switched 56
Diode Laser, 63
Direct Broadcast Satellite (DBS), 410, 436
Direct Satellite System (DSS), see Direct Broadcast Satellite
Direct Inward Dialing (DID), 80
Direct Inward System Access (DISA), 81
Discard Eligibility (DE), 289, 291
Discrete Cosine Transform (DCT), 407
Distance-Delivered Learning, 428
Distributed Queue Dual Bus (DQDB), 253, 293, 296, 298
Distribution Services, 318
Domsat Decision, 456

E

E-Carrier, 193, 201
Echo Checking, 173
Electromagnetic Interference (EMI), 22
Electric Power Utilities, 437
Electronic Industries Association (EIA), 269, 404
E-mail, 115, 368, 381
Encoding, 194
Encryption, 184, 392, 410
Enhanced Call Return, 324
Enhanced Call Routing, 324
Enhanced Switched Mobile Radio (ESMR), 341
Enterprise Computer Telephony Forum (ECTF), 99
Equal Access, 151
Error Control, 172, 208
Ethernet, 228, 230, 234, 236, 237, 244, 253, 254, 255, 413, 416
European Computer Manufacturers Association (ECMA), 252, 394
European Radio Message System (ERMES), 343
European Telecommunications Standards Institute (ETSI), 296, 307
Excess Burst Size (Be), 290
Exchange Carriers Standards Association (ECSA), 268, 269, 307
Explicit Congestion Notification (ECN), 291
Extended Binary Coded Decimal Interchange Code (EBCDIC), 169
Extended Superframe (ESF), 198

F

Facsimile, 104
Fax, 104
Fax-on-Demand (FOD), 106
Integrated Fax Messaging, 108
Federal Communications Commission (FCC), 132, 333, 340, 342, 346 396, 404, 455, 458, 467
Fiber Distributed Data Interface (FDDI), 232, 234, 237, 238, 250, 253, 256, 316, 413, 417
Fiber Optics, 61, 232, 237
Monomode, 65
Multimode, 64
Fiber-to-the-Curb (FTTC), 432
Fiber-to-the-Neighborhood (FTTN), 432
File Transfer Protocol (FTP), 380, 381
Filtering, 407
Find-Me Service, 323
Firewall 184, 394
FireWire, 257
Follow-Me Service, 323
Foreign Exchange (FEX, FX), 80, 145
Forward Error Correction (FEC), 172, 174
Forward Explicit Congestion Notification (FECN), 289
Frame Check Sequence (FCS), 174, 290
Frame Rate, 403
Frame Relay, 35, 223, 245, 248, 251, 278, 282, 290, 300, 303, 314, 412
Access, 284
Frame Structure, 288
Network, 285
Standards, 284
Frame Relay Assembler/Disassembler (FRAD), 248, 252, 283, 287, 289, 291
Frame Relay Network Device (FRND), 284, 378
Frame UNI, 306
Franchise Rights, 440
Frequency Allocation, 334
Frequency Division Duplex (FDD), 338, 348
Frequency Division Multiple Access (FDMA), 336, 348
Frequency Reuse, 335
Frequency Spectrum, 40
Front-End Processor (FEP), 164
Full Duplex (FDX), 166

G

G.707, 268
G.708, 268
G.709, 268
Gateway, 165
Generic Flow Control (GFC), 308
Global Information Infrastructure (GII), 423
Global System for Mobile Communications (GSM), 338, 349, 357
GOLAY, 341
Gopher, 388
Graham-Willis Act, 455
Grand Alliance, 406

H

H.221, 408
H.222, 408
H.231, 411
H.261, 408
H.310, 419
H.320, 408
H.323, 419
Half Duplex (HDX), 166
Header, 171
Header Error Control (HEC), 309
Hertz (Hz), 16
High Bit Rate Digital Subscriber Line (HDSL), 265
High-Definition TV (HDTV), 319, 405, 410
High-Level Data Link Control (HDLC), 178, 210, 246, 297
High Performance Parallel Interface (HPPI), 253
Home Area Network (HAN), 431
Home Page, 385, 387
Home Shopping, 429
Hub, 244
Hush-a-Phone, 455
Hypertext Markup Language (HTML), 380
Hypertext Transport Protocol (HTTP), 386

I

I.113, 304
I.121, 304, 316
I.122, 282
I.150, 304
I.211, 304
I.233, 284
I.311, 304
I.321, 304
I.327, 304
I.361, 304
I.362, 304
I.363, 304
I.370, 284
I.413, 304
I.432, 304
I.441, 220
I.515, 220
I.555, 304
I.610, 304
Implicit Congestion Notification (ICN), 291
Information Field, 290
Information Superhighway, 367, 423
Infrared, 61, 233, 354
Institute of Electrical and Electronics Engineers (IEEE), 228, 234, 252, 268, 269
Integrated Services Digital Network (ISDN), 212, 248, 251, 265, 284, 285, 302, 375, 378, 412, 415
B-Channel, 213
Basic Rate Interface, 213, 216,
Broadband, 213
D-Channel, 213
Equipment, 217
H-Channel, 213, 217,
Network Termination (NT), 218
Primary Rate Interface, 213, 216,
Standards, 220
Terminal Adapter (TA), 218, 248
Terminal Equipment (TE), 217
UNI, 212
Intelligent Network (IN), 320
Intelligent Peripheral (IP), 322
Intelligent Token, 393
Interactive Services, 318
Interactive Voice Response (IVR), 113
Interexchange Carrier (IEC, IXC), 140, 264
Interexchange Compatibility Forum (ICF), 268
International Electrotechnical Commission (IEC), 409
International Record Carrier (IRC), 142
International Standards Organization (ISO), 131, 252, 269, 409
International Telecommunications Union (ITU), 131, 198, 268, 269, 284, 302, 313, 316, 333, 341, 408, 409, 419, 455
Internet, 367, 419, 428, 433, 438,
Access, 374
Domains, 378
Network, 372
Physical Topology, 369
Protocols, 379
Regulation, 463
Security, 391
Standards, Administration, and Regulation, 371
Telephony, 383
Terminals, 373, 431
World Wide Web, 385
Internet Architecture Board (IAB), 371
Internet Assigned Numbers Authority (IANA), 372
Internet Engineering Task Force (IETF), 246, 305, 371, 394
Internet Research Task Force (IRTF), 372
Internet Service Provider (ISP), 265, 301, 372, 374, 383, 463
Internet Society (ISOC), 372
Inter-Switching System Interface (ISSI), 298
Intranet, 389, 370
IN-WATS, 147, 320
Iridium, 360
Isochronous, 167, 295
Isochronous Ethernet Integrated Services (Iso-Ethernet), 255, 413, 417

J

Japanese Digital Cellular (JDC), 349
Japanese Total Access Communications Systems (JTACS), 349
J-Carrier, 193, 201,
Joint Photographic Experts Group (JPEG), 409
Jughead, 388

K

Kerberos, 394
Key Telephone System (KTS), 72, 73, 343
Kingsbury Commitment, 455

L

LAPB, 210
LAPD, 283
Latency, 209
Least Cost Routing (LCR), 78
Light Emitting Diode (LED), 63
Line, 10, 145
Line Driver, 158
Line Overhead (LOH), 271, 275
Link, 10
Local Access and Transport Area (LATA), 139
Local Area Network (LAN), 227, 415
ATM, 316, 418
Baseband, 237
Bridge, 242
Broadband, 236
Bus, 234
CSMA, 234, 240
CSMA/CA, 241
CSMA/CD, 240, 253, 254
Gateway, 246
Hub, 244
Media Access Control (MAC), 237, 243
Media Access Unit (MAU), 242
Media Alternatives, 229
Multimedia, 416
Network Interface Card (NIC), 241
Network Operating System (NOS), 247
Remote LAN Access, 251, 264,
Ring, 234
Router, 245
Segmentation, 247
Standards, 252
Star, 235.
Switch, 244
Topology, 233
Virtual (VLAN), 250
Wireless, 232
Local Exchange Carrier (LEC), 137
Local Loop, 10
Local Management Interface (LMI), 290
Local Multipoint Distribution Services (LMDS), 267
Longitudinal Redundancy Check (LRC), 172
Luminance, 403

M

Macrocell, 336
Management Plane, 313
Mann-Elkins Act, 455
Mean Cell Transfer Delay (MCTD), 313
Measurement Interval (T), 291
Medium Access Control (MAC), 237, 295
MERIT Access Exchange (MAE), 370
MERIT Network, 370
Message Handling Service (MHS), 380
Message Mode, 311
Message Telecommunications Service (MTS), 146
Metropolitan Area Network (MAN), 253, 294
Microcell, 336
Microwave, 52
Military Network (MILNET), 369
Mobile Traffic Switching Exchange (MTSX), 347
Mobile Traffic Switching Office (MTSO), 347
Modem, 24, 158, 236, 351, 431
Modified Final Judgement (MFJ), 138, 426, 456
Modulation
Amplitude (AM), 18, 159, 336,340
Frequency (FM), 18, 159, 340
Phase (PM, PSK), 18, 160, 336
Pulse Amplitude (PAM), 199
Pulse Code (PCM), 195
Mosaic, 389
Motion-JPEG, 409
Motion Picture Experts Group (MPEG), 409
MPEG 1, 409
MPEG 2, 409, 432
MPEG 3, 410
MPEG 4, 410
Motorola Data Protocol (MDP), 353
MTS/WATS Decision, 456
Multilocation Extension Dialing, 324
Multimedia, 415
LAN, 416
Servers, 415
Software, 416
Standards, 419
Multiplexer
Add/Drop (ADM), 277
Frequency Division (FDM), 26, 236, 337
Inverse, 30, 411
Statistical Time Division (STDM), 28, 200, 272
Terminating, 276
Time Division (TDM), 28
Wavelength Division (WDM), 30, 278
Multi-Point Control Unit (MCU), 411
Multipurpose Internet Mail Extension (MIME), 380
Multi-Vendor Integration Protocol (MVIP), 98
Music-on-Demand (MOD), 429

N

Narrowband, 17
Narrowband-AMPS (N-AMPS), 348
National Information Infrastructure (NII), 423
National Research and Education Network (NREN), 302
National Science Foundation Network (NSFNET), 369
National Television Standards Committee (NTSC), 404
Netscape Navigator, 389
Network Access Point (NAP), 370
Network Information Center (NIC) Internet Register, 378
Network Interface Card (NIC), 237, 241,
Network Termination Unit (NTU) 431
Network-to-Network Interface (NNI), 285, 305, 317
Nordic Mobile Telephone (NMT), 349
North American Numbering Plan (NANP), 127, 464
Number Portability, 150, 325, 442, 464
Numbering Plan Administration (NPA), 127
Nyquist Theorem, 195

O

Off Premise Extension (OPX), 146
Offered Load, 290
Omnibus Budget Reconciliation Act, 457
Open Shortest Path First (OSPF), 246
Optical Carrier (OC), 270, 271, 42
OSI Reference Model, 131, 180, 245, 247, 249, 252, 283,352
Other Common Carrier (OCC), 139

P

Packet Assembler/Disassembler (PAD), 210, 248, 252, 283
Packet Radio, 352
Packet Switching, 204
Access, 210
Error Control, 208
Hardware, 211
Interconnection, 210
Packet Structure, 206
Standards, 211
Paging, 341
Parity, 173
Part 15, 346
Part 68, 456
Password Protection, 393
Path Overhead (POH), 272, 275
Payload, 206, 272
Payload Type Identifier (PTI), 309
Permanent Virtual Circuit (PVC), 209, 286, 290
Personal Communications Services (PCS),142 150, 357, 432
Broadband, 358, 437
Narrowband, 358
Network, 357
Personal Computer Memory Card Industry Association (PCMCIA),343, 351, 361
Personal Digital Assistant (PDA), 361
Function, 362
Network, 362
Phase Alternate Line (PAL), 405
Physical Layer (PHY), 309
Physical Medium (PM), 309
Picocell, 336
Picturephone, 411
Pixel, 403
Pleisiochronous, 168
Point-to-Point Protocol (PPP), 246, 376, 380 ,
Post Office Code Standardization Advisory Group (POCSAG), 341, 343
Publishing, 429
Private Branch Exchange (PBX), 72, 75, 343
Private Paging Operator (PPO), 342
Propagation Delay, 43, 59
Protocol, 164
Protocol Data Unit (PDU), 294
Provider of Last Resort, 441
Public Service Commission (PSC), see Public Utility Commission
Public Switched Telephone Network (PSTN), 123
Public Utility Commission (PUC), 132, 455
Px64, 408

Q

Q.770, 220
Q.921, 221
Q.922, 284
Q.931, 220
Q.933, 284
Quality of Service (QoS), 313
Quantization, 407
Quarter-CIF (QCIF), 408
Queued Packet Synchronous Exchange (QPSX), 294

R

Radio Act of 1927, 455
Radio Common Carrier (RCC), 342
Radio Data-Link Access Protocol (RD-LAP), 353
Rates and Tariffs, 462
Receiver, 10
Regenerator, see Repeater
Regional Bell Operating Company (RBOC), 138
Regional Holding Company (RHC), 138
Regulation, 440, 453,
Repeater, 23, 244, 277
Research for Advanced Communications in Europe (RACE), 302, 333
Resolution, 403
Right-of-Way, 441, 462
Router, 245, 297
Routing Information Protocol (RIP), 246
RSA, 392

S

Satellite, 55
Geosynchronous Earth Orbiting (GEO), 55, 359
Low-Earth Orbiting (LEO), 56, 359
Middle Earth Orbiting (MEO), 359
Scaling, 407
Scanning, 403
SCC Decision, 456
Search Mechanism, 388
Second Computer Inquiry, 456
Section Overhead (SOH), 271, 275
Secure European Systems for Applications in a Multivendor Environment (Sesame), 394
Secure HyperText Transport Protocol (S-HTTP), 393
Secure Socket Layer (SSL), 392
Security, 182
Security Administrator Tool for Analyzing Networks (SATAN), 395
Segment Field, 299
Segment Header, 299
Segment Payload, 299
Segmentation and Reassembly (SAR), 310
Sequenced Packet Exchange/Internet Packet Exchange (SPX/IPX), 250
Serial Line Interface Protocol (SLIP), 246, 376, 380
Service Creation Environment (SCE), 321
Service Management System (SMS), 322
Service Switching Point (SSP), 322
Set-Top Box, 431
Severely Errored Cell Block Ratio (SECBR), 313
Signal Computing System Architecture (SCSA), 98
Signal Control Point (SCP), 322
Signal Transfer Point (STP), 322
Signaling and Control, 36, 142,213
Common Channel, 143, 320
In-Band, 143
Out of Band, 143
Signaling System 7 (SS7), 144, 219, 317, 322, 357
Simple Mail Transport Protocol (SMTP), 120, 380
Simplex, 165
Sine Wave, 18
SIP Relay, 297
SMDS Interest Group (SIG), 295
SMDS Interface Protocol (SIP), 297
Software-Defined Network (SDN), 149
Source Routing Protocol (SRP), 243
Source Routing Transparent (SRT), 243
Spanning Tree Protocol (STP), 243
Sparse Network, 320
Spread Spectrum, 232
Station Message Detail Recording (SMDR), 78
Store Locator Service, 324
Streaming Mode 311
Subscriber Access Terminal (SAT), 296
Subscriber Identification Module (SIM), 349
Subscriber Network Interface (SNI), 296, 297
Switch, 11
Access Tandem, 130
Cell, 36
Circuit, 31
Core, 307
Crossbar (XBar), 33
Edge, 307
Electronic Common Control (ECC), 34
Frame, 35, 287,
LAN, 244
Manual, 31
Packet, 35, 204,
Photonic, 36
Step-by-Step (SxS), 32
Tandem, 130
Switched 56, 190, 248, 251, 284
Switched Mobile Radio (SMR), 340
Switched Multimegabit Data Service (SMDS), 223, 245, 248, 251, 278, 292, 293, 303, 311, 314, 378, 413
Access, 296
Network, 297
Protocols, 298
Switched Virtual Circuit (SVC), 209, 286
Symmetrical Digital Subscriber Line (SDSL), 265
Synchronization, 404
Synchronous, 161, 167, 176
Synchronous Data Link Control (SDLC), 177
Synchronous Digital Hierarchy (SDH), see Synchronous Optical Network
Synchronous Optical Network (SONET), 250, 267, 294, 296, 298, 307, 314, 317, 372
Frame Format, 274
Topology, 272
Transmission Hierarchy, 270
Synchronous Payload Envelope (SPE), 271
Synchronous Transport Signal (STS), 271
Systeme Electronique Couleur Aven Memoire (SECAM), 405
Systems Network Architecture (SNA), 179, 247, 250, 289, 292

T

T.120, 411
T.30, 108
T.434, 108
T.606, 284
T.617, 284
T.618, 284
T.81, 408
T1.105, 268
T1.106, 268
T1.413, 262
Tariffs, see Rates and Tariffs
Taxation, 442
T-Carrier, 192, 248, 251, 284, 292, 296, 311, 378, 412
Channelized, 193
Encoding, 194
Fractional, 202
Framing, 197
Unchannelized, 194
Telecommunications Act of 1996, 140, 426, 457
Telecommuting, 251, 264
TeleMedicine, 420
Telephony Application Programming Interface (TAPI), 97
Telephony Services Application Programming Interface (TSAPI), 97
Television, 401, 428
Standards, 404
Telnet, 380
Terminal Adapter (TA), 162, 248, 252
Text, 172
Time Assigned Speech Interpolation (TASI), 196
Time Division Duplex (TDD), 339, 349
Time Division Multiple Access (TDMA), 338, 349, 357
Token Passing, 234, 237, 238, 239, 244, 253
Token Ring, 231, 234, 237, 238, 239, 250, 255
Total Access Communications Systems (TACS), 348
Trailer, 172
Transforms, 407
Transmission Control Protocol/Internet Protocol(TCP/IP), 247, 249,351,369, 376, 379
Transmission Convergence (TC), 310
Transmitter, 10
Transport Overhead (TOH), 271
Trunk, 11, 145, 146
Trunk Mobile Radio (TMR), see Switched Mobile Radio
Twinaxial Cable, 230
Twisted Pair, 45, 231
Shielded, 49, 231, 237, 314
Unshielded, 45, 231, 237, 307, 314

U

United States Digital Cellular (USDC), 349
Universal Code (UNICODE), 171
Universal Service, 458, 463
Universal Service Locator (URL), 386
User Network Interface (UNI), 284, 285, 290, 305
User Network Interface A (UNI A), 317
User Network Interface B (UNI B), 317
User Plane, 313

V

V.110, 221
V.120, 221
Variable Bit Rate (VBR), 311
Veronica, 388
Versit, 98
Vertical Redundancy Check (VRC), 173
Very High Data Rate Subscriber Line (VDSL), 263, 265
Very Small Aperture Terminal (VSAT), 58, 292, 314, 342, 410
Video, 401
Bandwidth, 406
Basics, 403
Compression, 406
LAN Networks, 413
Server, 411, 432
Standards, 407
WAN Networks, 412
Videoconferencing, 409, 410, 413, 428
PC-based Systems
Rollabout Systems, 414
Room Systems, 414
Videophone, 410, 411,
Video-on-Demand (VOD), 264, 428, 432
Virtual Channel (VC), 274, 311
Virtual Channel Identifier (VCI), 308
Virtual Path (VP), 273, 311
Virtual Path Identifier (VPI), 308
Virtual Private Network (VPN), 149, 320
Virtual Tributary (VT), 273
Voice Processing, 110

W

WATS, 146
Waveguide, 62
Whiteboard, 416
Wide Area Information Service (WAIS), 389
Wideband, 17
Wireless, 232, 142, 331, 433, 437,
Access Techniques, 336
Cell Concept, 335
Frequency Allocation, 334
Multiplexing, 336
Power Level, 334
Standards and Regulations, 333
Wireless LAN, 353
Wireless Local Loop (WLL), 142, 266, 354, 432
Wireless Office Telecommunication Systems (WOTS), 343
World Administrative Radio Conferences (WARC), 333
World Wide Web (WWW), 385

X

X.25, 35, 204, 245, 248, 250, 283, 311, 314, 342, 353
X.29, 211
X.3, 211
X.31, 212
X.32, 212
X.3T9-3, 253
X.3T9-5, 253
X.75, 211, 212
X.400, 118, 379
X.500, 118, 379
Xerox Networking System (XNS), 250


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