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Fundamentalsof Telecommunications

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654
INDEX
convolutional codes, 256
"cookbook" subscriber loop design methods,
98­102
cordless telephone technology, 478, 481­483
corrected reference equivalent (CRE), 43
correlation, in direct sequence spread spectrum,
474­476
coulomb, 589
counter emf, 588
coupler device, 433
coupling loss, 50
crankback, 184, 185
critical angle, 232­233, 233f
crossbar markers, 73
crossbar telephone switching, 71, 72
cross-modulation (Xm), 438­439
crosstalk, 32, 50­51, 269, 270
in long-distance PCM transmission, 128
crowding, in geostationary orbits, 219
CSMA/CA (carrier sense multiple access with
collision avoidance) protocol, 342­343
CSMA/CD (carrier sense multiple access/collision
detection) LAN, 299, 300­306
later versions of, 304­306
propagation time for, 303
CSMA (carrier sense multiple access) LAN, 299,
300­306
CT2 common air interface, 482
CT2+ common air interace, 482
cue channel, 413
cultural factors, calling habits and, 173
current
in ac circuits, 594­596
early sources of, 20­21
subscriber loop, 95
current flow, telephone, 93
customer premise equipment (CPE), 169, 195
customer satisfaction, 14
cyclic redundancy check (CRC), 256
CRC-4, 546­547
CRC-6, 545
dash, Morse code, 22
data channel propagation time, 376
data circuits
as a QoS parameter, 44­45
signaling on, 388
data communication equipment (DCE). See
DTE­DCE interface
data communications, 251­290
binary convention in, 252
binary transmission and time concept, 259­265
coding in, 252­254
data interface in, 265­267
data protocols in, 278­287
data transmission errors, 254­258
dc nature of data transmission, 258­259
defined, 251
digital transmission on an analog channel,
267­278
layers of, 280­281
data frame, 261f, 388f
datagram routing method, 318, 319. See also
internet datagram
data-link connection identifier (DLCI), 331, 333,
335
data-link layers
OSI model, 282­283
protocols for, 283
TCP/IP and, 320­322
data messages
compatibility of, 317­318
requirements for, 315­318
routing, 316­317
urgency of, 317
data modem, 48, 265
data networks
optimizing return on, 278
protocols for, 316
data protocols, 278­287
latency of, 317
data rates, digital network, 277
data terminal equipment (DTE), 300
data traffic
intensity of, 89
quantifying, 66­67
data transfer, 284. See also data transmission
data transfer phase functions, SCCP, 379
data transmission. See also data communications
attenuation distortion in, 269
based on CCITT Rec. V.110, 277­278
defined, 251
on a digital network, 277­278
noise in, 269­271
on permanent virtual circuits, 388
phase distortion in 268, 269
versus digital telephony, 387­388
data user part (DUP), 364
Dauber, Steven, 542, 543
dBd values, 635. See also decibels (dB, dBm)
dBi values, 635
dBmC unit, 628­630
dBm values, calculating, 619­621, 624­625
dBmV values, 434­435
dB values, calculating, 623­625
dBW values, calculating, 619­621, 624­625
dc (direct current) circuits, 23
electrical power in, 584­585
dc loops, 258
calculating resistance in, 96
dc networks, solving problems in, 583­584
dc signaling, negative-impedance repeaters and,
104
dc transmission, 258­259
DDS signal subhierarchy, 278f
decibels (dB, dBm), 14, 41, 42, 51, 52, 615­635.
See also dB entries
basics of, 615­619
decision circuit, 35
decoding, 119
DECT (digital European cordless telephone), 482
degrees, time-scale, 27­28
degrees of rotation, angular, 25
dejitterizer, 393
delay, 47. See also echo delay
LEO system, 484
postdialing, 160
probability of, 63
TDMA, 470
delay distortion, 33
delay equalizer, 276
delay spread, 472
delay time, 52

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Summary :

654 INDEX convolutional codes, 256 "cookbook" subscriber loop design methods, 98­102 cordless telephone technology, 478, 481­483 corrected reference equivalent (CRE), 43 correlation, in direct sequence spread spectrum, 474­476 coulomb, 589 counter emf, 588 coupler device, 433 coupling loss, 50 crankback, 184, 185 critical angle, 232­233, 233f crossbar markers, 73 crossbar telephone switching, 71, 72 cross-modulation (Xm), 438­439 crosstalk, 32, 50­51, 269, 270 in long-distance PCM transmission, 128 crowding, in geostationary orbits, 219 CSMA/CA (carrier sense multiple access with collision avoidance) protocol, 342­343 CSMA/CD (carrier sense multiple access/collision detection) LAN, 299, 300­306 later versions of, 304­306 propagation time for, 303 CSMA (carrier sense multiple access) LAN, 299, 300­306 CT2 common air interface, 482 CT2+ common air interace, 482 cue channel, 413 cultural factors, calling habits and, 173 current in ac circuits, 594­596 early sources of, 20­21 subscriber loop, 95 current flow, telephone, 93 customer premise equipment (CPE), 169, 195 customer satisfaction, 14 cyclic redundancy check (CRC), 256 CRC-4, 546­547 CRC-6, 545 dash, Morse code, 22 data channel propagation time, 376 data circuits as a QoS parameter, 44­45 signaling on, 388 data communication equipment (DCE).


Tags : transmission,see,delay,alues,digital,dbm,calculating,time,protocols,circuits,telephone,current,269





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