 ATM, 41/11-13 mobile station communications, Seams, minimising EMC, 23/20 baseband LAN, 56/8 51/17-18 SEC (Single Error Correction) codes, 14/5 broadband LAN, 56/8 ORBITA network, 51/5 SECAM television, 57/7 cellphones, 47/3, 47/9 orbits, 51/5-8 Security, common channel, 43/7-8 packet switching over, 54/10 EDI, 38/6-7 CTCSS, 46/9 paging, 45/17-18 exchange systems, 31/16-17 DC line, 43/4-5 PALAPA, 51/3 GSM cellphones, 47/13-14 dial pulse telephones, 58/9 parking orbits, 51/5 modems, 39/12 digital network, 43/8-10 positional sensors, 51/8 Security management, 16/5 digital private network, 34/9-10 power supplies, 51/8 SED (Single Error Detecting) codes, double current, 34/8 Space Shuttle, 51/5 14/4-5 dual tone medium frequency, 46/9 spacecraft technology, 51/5-10 Self and mutual information, 4/5-6 dual tone multi-frequency, 34/9, 58/9-10 Index/20 E&M, 34/7-8 sporadic E propagation, 6/21 specification, 25/3 FFSK, 46/7, 46/9, 47/9 sunspots, 6/21 structured design methods, 25/5-6, GSM cellphones, 47/13 see also Electromagnetic waves; 25/8-9 inter-register, 34/8-9 Radiowave propagation system testing, 25/4 ISDN aspects, 44/12 Slicer, pulse time modulation, 18/14-15 testing, 25/14-16 loop disconnect telephones, 58/9 SLIM software costing, 25/19 SOGT (Senior Officials Group on PABXs, 34/7-11 Slips, TDM errors, 21/11, 30/8 Telecommunications), 22/19 PCM, 43/7 SLM (System Load Module), DMS, 32/23 SOH (Section Overhead) byte, SDH, sequential tone, 46/9 Slope overload, DPCM and DM, 19/17, 42/12-15 single frequency, 34/8 19/19, 19/20 Sojourne time distribution, queue switching systems, 31/8 Slotted ring, multiple access, 13/19 modelling, 3/15 TDM, 21/5 SLR (Sound Loudness Rating), 30/9 Solar flares, 9/4 telephones, 58/8-10 SMAE (Systems Management Solar power generation, 24/3-4 telex, 59/3-5 Application Entity), OSI, 16/14 Solar radiation, 9/3 user network, 43/10-11 SMASE (Systems Management moving satellites, 51/6 Signals, Application Servic Element), OSI, 16/14 Solar wind, 51/6 classification and representation, 10/6-8 SMAT