 (digital AMPS) 367 E.164 275, 276, 278, 361 data offload 255 echo 223, 225, 226, 282, 326, 396 data over cable service interface e-commerce service 188, 263 specification (DOCSIS) EDGE 138, 182, 322, 356, 369, 370 data warehousing 32, 449, 451 edge node 83, 84, 89, 199, 240, 253, DCN (data communication network) 254, 267, 319-322, 328, 334, 432, 433 336, 352, 360, 361, 363, 368, dejitterization 179, 226, 234 377, 386, 395, 399 delay and jitter 226, 232, 452 edge routers 216, 443, 452 delay variation 159, 161, 177, 179, EDI (electronic data interchange) 296, 223, 224, 226, 231 demilitarized zone (DMZ) 206 EF (expedited forwarding) 346, 347 denial of service 187, EGP 342 218, 220, 267 egress LER 347 dense wavelength division multiplex electronic signatures 209 (DWDM) 331, 363 ELL (emulated leased line) dependability 50, 67 empowerment 34, 35 DESP 32 EMS 158, 311 92, 94, 276-278, 456 diameter 203 enabler 11, 14, 44, 50, 59, 79, 89, 94, differentiated services 237, 240, 242, 110, 127, 130, 184, 190, 198, 326, 344, 346 201, 210, 215, 220, 222, 226, diffserv 53, 242, 245, 267, 326, 237, 240, 260-264, 287, 289, 344-347, 417, 418, 453 292, 293, 297, 299, 313, 315, diffserv code point (DSCP) 242, 316, 323, 353, 390, 417, 430, 444 diffserv, RSVP 94 encapsulating security payload (ESP) dimensioning factor directory server encryption 30, 91, 96, 172, 191, 192, discretionary cost 136, 138, 439 196-199, 201, 204, 207-209, distance vector routing 343 214, 215, 217-220, 227, 267, DMZ 206 308, 327, 451, 452 94, 164, 195, 199, 276, 277, enhanced message service (EMS) 301, 393, 402, 407, 419 158, 261 DNS protection enhanced telecom operation map DOCSIS 378 enterprise resource planning (ERP) domain name server (DNS) 277 39, 286 domain name system (DNS) 32, 214 Index Ethernet 57, 95, 145, 191, 313, 337, G.723.1 Algebraic CELP 169 340, 347, 354, 355, 360-363, G.726 ADPCM (Adaptive Differential 376, 377 PCM) 169 eTOM (enhanced telecom operation G.728 Low delay CELP 169 map) 102, 103, 438 G.729 Conjugate structure CELP 169 extensible m