ion, 9/5 I series standards for B-ISDN, INDICATION, OSI layer services, 12/6 Hata's formula, path loss, 47/6 adaption layer description, 41/15 Induction fields, 6/8 Hayes AT protocol, modems, 39/11 adaption layer specification, 41/15-16 Industrial applications, frequency HD-MAC TV transmission proposals, functional characteristics, 41/9-10 allocations, 26/6 57/10-11, 57/12 general nework aspects, 41/11-14 Inference, scientific, 4/3 HDLC (High Level Data Link Control), OAM principles, 41/18 Information services, cellphones, 47/16 cellphones, 47/16 protocol reference model, 41/14-15 Information systems, pair cables for, 15/5 ISDN, 44/9 service aspects, 41/10-11 Information theory, 4/1-12 ISDN signalling, 44/12 user network interface, 41/16-18 capacity of a store, 4/4 PABXs, 34/7 vocabulary of terms, 41/9 channel capacity, 4/7-9 packet switching, 54/9 I series standards for ISDN, services, channels with memory, 4/9-10 statistical TDM, 40/6 44/4, 44/11 continuous channels, 4/11-12 HDTV (High Definition TV), 11/9, 51/19, IAB (Internet Activities Board), 16/19 discrete memoryless channels, 4/6-7 57/10-12, 57/23, 57/29 ICA (International Communications entropy, 4/5-7 Head end, Cable TV, 57/18 Association), 22/26 logarithmic definition, 4/5 Headsets, 58/11-13 ICAO (International Civil Aviation mutual and self information, 4/5-6 see also Telephone instrument Organisation), 26/3 store capacity, 4/4 Health and Safety at Work Act, 24/15 Ice crystals, depolarisation effects, 6/20 and thermodynamics, 4/5 Hearing, 8/5-9 IDA (Integrated Digital Access), ISDN, Infrasonic waves, in ionosphere, 9/7 see also Sound 44/11 InGaAsP avalanche photodetectors, 53/16 HEC (Header Error Control), 41/4, 44/16 IDC (Insulation Displacement INMARSAT satellites, 51/3, 51/17-18 Helmholtz resonator, 8/10 Connection), 33/8 Inspections, software testing, 25/14 Hermtian symmetry, 28/13 IDCT (Inverse DCT) specification, 57/29 Insulation, safety, 23/7 HF carrier systems, pair cables for, 15/5 Identifiers, OSI layer services, 12/7 Integration software tes