24 THE BELL TELEPHONE SYSTEM TECHNICAL JOURNAL, 1956 



Switch 

 waveguide 



structure illus 1121 

 Switching 



background 991 

 concentrator 

 line 

 remote controlled 

 economy 249-93 

 knowledge 991 

 local 



crossbar tandem 

 application 91-93 

 nationwide 



crossbar tandem 

 application 94-97 

 toll 



translator 

 card 716-19 

 magnetic drum 707^5 

 Switching Systems 

 4A toll 



translation 

 card 716-19 

 magnetic drum 708-45 

 concentration 249 

 control 998-1012 

 defined 993 

 design 



electronics in 991-1018 

 electronic 



reliability 1016 

 electronics in 991-1018 

 equipment concepts 1012-14 

 interconnecting network 994-98 

 long distance 



crossbar tandem as 91-108 

 maintenance 1014-16 

 See also Crossbar Systems 

 ^ Syracuse, New York 

 toll traffic 7tiap 439 



TWT See Electron Tube: traveling 

 wave 



Tables of Phase of a Semi-Infinite Unit 

 Attenuation Slope (D. E. Thomas) 

 747-49 



Tandem Crossbar See Crossbar Sys- 

 tems 



Tannenbaum, Morris 



biographical material 246 

 Diffused Emitter and Base Silicon 

 Transistors 1-22 

 Tape-0-Matic Test Set See Test Set 

 Tapered Coupler See Coupler 

 Technical Papers, Bell System, not 

 published in this Journal 235-41, 

 519-26, 751-58, 973-78, 1223-29, 

 1454-60 

 Telephone See Dial Telephone 

 Temperature 

 diode 

 junction 



germanium 661 

 silicon alloy 661 

 modulator 

 microwave 

 noise 1404 

 Tendick, Frank H., Jr. 



biographical material 1236 

 Transistor Pulse Regenerative Ampli- 

 fiers 1085-1114 

 Test(s), Testing 

 antenna 

 microwave 

 pulses, millimicrosecond 45-48 

 circuits 

 relay 



switching 

 automatic 1155-78 

 crystal 



germanium 642-43 

 defined 1129-30 

 dial telei)hone 

 (in) manufacture 

 automatic 1129-54 

 electron tube 

 traveling wave 

 M1789 1342-43 

 manual 



cost 1129-54 

 network 

 425B 



automatic 1135-41 

 oscillator 

 56A 



film scales 



calibration 1148-54 



