, 342 Bluetooth protocol stack, 347f batteries, in telegraph circuits, 23 Bluetooth WPAN, 344, 345-346 battery feed bridge, 4 packet, 346f battery terminal, 21 piconet, 346-347 battery voltages, subscriber loop, 94 scatternet, 347 baud, 263 BNZS codes, 120 period of, 263-264 Boltzmann, Ludwig, 48 baud rate, 274 Boltzmann's constant, 48, 226 baud-rate bandwidth, 210 both-way circuits, 9-10 bearer channels, 330 broadband amplifiers, 433 "beats,", 434, 437 broadband ISDN (B-ISDN), 514. See also B-ISDN Bellcore (Bell Communications Research), 16 entries slip performance, 143-144 reference model for, 515f Bell operating company (BOC), 548 "broadband" satellite systems, 484 Bell System, 1, 16 broadband services, 802.16 MAC design, 348-349 "bent-pipe satellite systems,", 217, 227 broadband transmission, LAN, 292 BER performance, 211f. See also bit error rate B-TE (terminal equipment) groups, 515-516 (BER) buffer delay, 393 billing, frame relay network, 333-334 buffer overflow, 11 binary codes, 114f, 115f, 116f, 254 building penetration radio propagation model, 464 digital symbols in, 264 built-in test equipment (BITE), 31 in pulse-code modulation, 109-113, 113-118 bulk retrieval mechanism, SNMPv.2, 560 binary designations, equivalent, 252 bulk service queue discipline, 63 binary digit, 30, 31. See also bit (binary digit) burst errored seconds, 142, 143 binary digital signals, 29-31, 107 burst errors, 255 binary digital transmission, 19 burst frame mode, 221 binary system, 31 burst profiles, 353 binary transmission, 259-265 business traffic peaks, 14 binary transmission system, error rate of, 120 bus network topology, 292, 293f bi-phase-L (Manchester) coding, 265 busy-back, 5, 68, 150 bipolar bit streams, 119f busy hour (BH), 7-8, 56-57 bipolar transmission, 119-120 noncoincident, 14 bipolar waveform, 119f, 122 variations in, 13-14 B-ISDN/ATM layering, 521f "busy-out,", 72 B-ISDN/ATM routing/switching, 528-530 "busy signal,", 5 bit alignment, synchronous systems, 262 busy test local switch function, 70 bit error accumula