6/8 ATM, 41/8-18 US Department of State (USA), 22/23-4 SPC (Stored-Program Control), broadband, 44/17 see also acronyms for individual digital exchanges, 29/10, 31/8, 31/15 CCIR recommendation 594-1, 61/10-11 organisations signalling, 43/7-8 CCITT recommendation G.921, 61/11 Standby power supplies, 24/4-8 SPE (Synchronous Payload Envelope), CCITT recommendation M.550, 61/11 Star cabling, 33/6 SONET, 42/17 digital cordless telephones, 49/4 Star network topology, 56/9 Speaker verification (voice printing), 37/8 GSM900, 48/3 Star quad cable, 15/3 Specifications, software, 25/3 ISDN, 44/3 STAR (Special Telecommunications Spectra management and utilisation see LANs, 56/9-11 Action for Regional Development), 11/9 Frequency assignment, allocation and measurement and performance, 61/3-7 State dependent birth rate, teletraffic, 5/14 management modem interfaces, 39/7-8 State Transition Diagrams, software, 25/5 Spectral analysis/analysers, 7/6 modems, 39/3, 39/5-9 Static analysis, software, 25/14 Spectral leakage, 2/17 multiplexing physical layer, 40/13 Static inverters, power systems, 24/8 DFTs, 2/8 PMR, 46/8-9 Statistical analysis, 1/1-11 Spectroradiometers, 7/6-7 production and problems, 22/3-5 Statistical distribution, information Spectrum, optical, 7/3 RFI emission, 23/22 content of, 4/5 Speech, safety, 23/4-5, 23/7-10 Statistical multiplexing, 40/6-8, 56/4 cellphone coding, 47/11-12 SDH, 42/8-18 Status accounting, software, 25/18 codec measurements, 61/30 telephone, 58/11 STD (Subscriber Trunk Dialling), 29/12 compression, 37/7-8 Standards, organisations, STDM (Synchronous Time Division recognition, 37/8 Australian, Multiplex), 40/5-6, 41/3 see also Sound ACC, 22/26-7 STE (Signalling Terminating Equipment), Speed conversion flow control, modems, AIIA, 22/27 packet switching, 54/6 39/12 ATUG, 22/27 Step index optical fibre, 53/4 Spillover efficiency, antenna, 17/9 AUSTEL, 22/27 Step-by-step exchanges see Strowger Spin, cable TV, 57/18 Standards Australia, 22/27 exchanges Splicing optical cables, 53/6 European, Sticky r