01160 a2200229 4500 Nust 20170207153244.0 80028236 0830612785 (pbk.) : 0830696350 : Nust 621.382 Hobbs, Marvin. Modern communications switching systems / by Marvin Hobbs. 1st ed. Blue Ridge Summit, Pa. : Tab Books, 1981. 308 p. : ill. ; 22 cm. Includes index. The Slow Push for Progress (Page-7) Basic Switching and Traffic Concepts (Page-19) Logic Switching Algebra and Control (Page-39) Circuit Switches and Relays for Speech (Page-56) Control and Signal Methods (Page-78) Modern Step-by-Step and Rotary Exchanges (Page-104) Electromechanical Crossbar Systems (Page-128) Electronic Exchanges with Wired Logic (Page-142) The Elements of Stored Program Control (Page-162) Typical SPC Exchange Switching Systems (Page-199) Data and Telex Switching (Page-215) Automatic Private Branch Exchanges (Page-229). Almirah No.36 Shelf No.5 Telecommunications engineering. ddc BK 182547 182547 0 0 ddc 0 0 NFIC MCS MCS 2016-12-12 0 621.382 HOB MCS5730 2016-12-08 2016-12-12 BK