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Digital Switching - I

Engineering Academy

Engineering Academy

Learn Without Limits: Free Engineering Courses

Rating 4 (7)
Course typeWatch to learn anytime
Duration 989 Min
Start Access anytime
Language English
Views71

FREE

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Digital Switching - I

Why enroll

People join this course to understand how telephone networks actually connect calls and messages behind the scenes. It helps them learn how modern digital switching systems replaced old mechanical exchanges, making communication faster and more reliable. The course builds strong basic knowledge of telecom systems, which is very useful for careers in networking and communication fields. Many students also take this course to prepare for exams in electronics and communication engineering. Overall, it helps learners develop practical understanding for designing, analyzing, and troubleshooting telecom systems in real life.

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Course content

The course is readily available, allowing learners to start and complete it at their own pace.

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Digital Switching - I

30 Lectures

989 min

  • Introduction to Telephony and Networks

    Preview icon

    Preview

    46 min

  • Strowger Automatic Exchange

    26 min

  • Crossbar Switching

    46 min

  • Logic Circuit for Crosspoint Operation

    13 min

  • Introduction to Multistage Interconnection Networks

    16 min

  • Blocking probability of crossbar switches

    32 min

  • Call congestion and time congestion

    17 min

  • Clos network

    26 min

  • Lee's approximation

    14 min

  • Karnaugh's approximation

    50 min

  • Time switch

    25 min

  • Time switch and Clos network

    24 min

  • TST switch, Strictly Non-blocking network, Rearrangeably non-blocking network

    34 min

  • Paull"s Matrix

    34 min

  • f-way multicasting

    29 min

  • Strictly sense non blocking multicasting switch

    18 min

  • Rearrangeably non blocking networks

    20 min

  • Slepian Duguid theorem, Paull's theorem

    54 min

  • Paull's matrix for rearrangeabbly non blocking networks

    13 min

  • Recursive construction; Crosspoint complexity for rearrangebly and strictly non-blocking networks

    54 min

  • Cantor network

    29 min

  • Wide-sense non blocking network

    43 min

  • Example of wide -sense non-blocking switch

    37 min

  • Packet Switching

    32 min

  • Buffering strategies

    40 min

  • Output Queued Switch

    36 min

  • Input Queued Switch

    37 min

  • Banyan Network, Delta Network

    46 min

  • Shufflenet as Delta network

    68 min

  • Performance analysis of crossbar and delta network

    30 min

Course details

This course teaches you how modern telephone and data networks connect people and information using digital technology. It starts with the basic idea of a telephone network — how two phones get connected when you make a call — and explains what happens inside the big machines called switches that make that connection fast and accurate.You’ll learn the history and evolution of switching — from old electromechanical systems with relays and mechanical selectors, to fully digital switches that use computers and software to route calls. The course breaks down how different switching systems are designed, how calls are set up and torn down, and how networks handle many calls at once without confusion. It also introduces basic packet switching, which is the foundation of modern data networks like the Internet. Along the way you’ll explore fundamentals like signaling methods, blocking and non-blocking networks, and multistage switch designs. By the end, you’ll understand both theory and practical concepts used in real telecommunications systems.

Source: Digital Switching - I [Youtube Channel] NPTEL

Course suitable for

  • Automotive
  • Electrical
  • Engineering & Design
  • Research & Developmnet
  • Project Management

Key topics covered

  • Basics of telephone networks and why switching is needed

  • Difference between analog and digital switching systems

  • How telephone exchanges work at a high level

  • Structure of signaling systems in telecom networks

  • Principles of Strowger (step-by-step) automatic exchange

  • How crossbar switching systems operate

  • Logic circuits used for crosspoint switching

  • Pulse and message signaling methods

  • Introduction to time-division multiplexing (TDM)

  • Digital switching fabrics and their advantages

  • Blocking vs. non-blocking switch design

  • Call setup and teardown procedures in digital systems

  • Common channel signaling concepts

  • Stored program control (SPC) in exchanges

  • Reliability, maintenance, and faults in switching networks

FREE

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