so Facsimile (Fax) 22/22 Call control, recommendation G.821, 61/8-10 safety standards, 23/13 ATM, 41/20 service classification, 11/17-18 BSS (Base Station System), PCN modems, 39/11 CCM (Common Channel Module), network, 48/9 Call diversion, cellphones, 47/15 System 12, 32/10 BT (British Telecom), 11/10, 22/6, 22/21 Call loss see Erlang's lost calls equation; CCR (Commitment, Concurrency and ISDN developments, 44/10-13 Teletraffic, theory Recovery), OSI, 16/9 BTS (Base Transceiver Station), Call management, CCS (Call Cent Second), 31/8 PCN/cellphones, 47/9, 48/4, 48/5, 48/6, call accounting, 36/5-6 CCS (Common Channel Signalling), 48/9-10 client environment, 36/5 37/7, 43/7-10 Budgets, attenuation, corporate environment, 36/3-5 subsystem, AXE system, 32/16 multipoint radio link, 52/5-6, 52/10-11 hospital/university environment, 36/5 CCSC (Control Channel System optical fibre power, 53/23 lodging environment, 36/5 Codeword), PMR, 46/7 Buffering, ATM switches, 41/7-8 shared tenant environment, 36/5 CDLC (Cellular Data Link Control), Building engineering services, 24/15 Call pick up, PABXs, 34/12 47/16 Burst error correcting codes, 14/9 Call processing, PMR, 46/7 CDMA (Code Division Multiple Access), Burst-mode technique, BT ISDN, 44/11 Call routing apparatus, 37/7 13/3, 13/15-16, 14/12-13 Bus cabling, 33/6 Call tracing, networks, 40/15 cellphone, 47/17 Bus network topology, 56/9 Callback on busy, PABXs, 34/12 PABX, 34/15 Business set interface, Centrex, 35/3 Caller identification, 36/4 satellite, 51/14 Bypass carriers, 11/7 Calling, PABXs, 34/5-6, 34/12-13 CDR (Call Data Recording), 36/3 Calling number identity, 58/8-9 CEC (Commission of the European C++ programming language, 25/14 Canada, paging frequencies, 45/4 Communities), 22/16, 22/22 C450 cellphones, 47/9 Capture effect, FM, 18/10 Ceefax, 57/14 C-MAC television audio, 57/8, 57/10 Carbon microphone, 31/4, 58/3 Cell delay variation, ATM, 41/20 C/l (Carrier to Interference) ratio, Carrier compression, FDM, 20/7 Cell Relay fast packet switching, 55/3, cellphones,