# InfoCoBuild

## Digital Switching I

Digital Switching I. Instructor: Prof. Yatindra N Singh, Department of Electrical Engineering, IIT Kanpur. This course provides the fundamental concepts of digital switching systems with an emphasis on how the telephone exchange and packet switching systems operate. Topics covered in the lectures include: Introduction to telephony and networks, Strowger automatic telephone exchange, Crossbar switching, Logic circuit for crosspoint operation, Multistage interconnection networks, Call blocking probability of crossbar switches, Call congestion and time congestion, Clos network, Strictly non-blocking network, Rearrangeably non-blocking network, Cantor network, wide-sense non-blocking network, Packet switching, Input queued switch, Output queued switch, Banyan network, Delta network, and Buffered delta Network. (from nptel.ac.in)

 Introduction to Telephony and Networks

 Lecture 01 - Introduction to Telephony and Networks Lecture 02 - Basic Operation of Strowger Automatic Telephone Exchange Lecture 03 - Fundamentals of Crossbar Switching Lecture 04 - Logic Circuit for Crosspoint Operation Lecture 05 - Introduction to Multistage Interconnection Networks Lecture 06 - Estimation of Call Blocking Probability of Crossbar Switches Lecture 07 - Call Congestion and Time Congestion Lecture 08 - Clos Network Lecture 09 - Lee's Approximation - Estimation of Call Blocking Probability Lecture 10 - Karnaugh's Approximation - Estimation of Call Congestion Probability Lecture 11 - Time Switch and its Working Lecture 12 - Time Switch and Clos Network Lecture 13 - TST Switch, Strictly Non-blocking Network, Rearrangeably Non-blocking Network Lecture 14 - Paull's Matrix and Clos Theorem Lecture 15 - F-way Multicasting Clos Network Lecture 16 - Strictly Sense Non-blocking Multicast Switching Network Lecture 17 - Benes Network, Examples of Rearrangeably Non-blocking Networks Lecture 18 - Slepian Duguid Theorem, Paull's Theorem Lecture 19 - Paull's Matrix for Rearrangeably Non-blocking Networks Lecture 20 - Recursive Construction of a Clos Network with Benes Network Lecture 21 - Cantor Network Lecture 22 - Wide-sense Non-blocking Network Lecture 23 - Example of Wide-sense Non-blocking Switch Lecture 24 - Packet Switching Lecture 25 - Buffering Strategies Lecture 26 - Output Queued Switch Lecture 27 - Input Queued Switch Lecture 28 - Banyan Network and Delta Network Lecture 29 - Shufflenet as Delta Network Lecture 30 - Performance Analysis of Crossbar and Delta Network Lecture 31 - Properties of Delta Network Lecture 32 - Buffered and Unbuffered Delta Network Lecture 33 - Analysis of Buffered Delta Network Lecture 34 - Analysis of Buffered Delta Network (cont.) Lecture 35 - Analysis of Buffered Delta Network (cont.)

 References Digital Switching I Instructor: Prof. Yatindra N Singh, Department of Electrical Engineering, IIT Kanpur. This course provides the fundamental concepts of digital switching systems.