7.11.11 Why Did Telephone Networks Change From FDM To TDM?
Explore the technological evolution of telephone networks from analog frequency-division multiplexing to digital time-division multiplexing. Learn why advances in digital electronics, pulse-code modulation, and optical transmission made TDM more efficient, scalable, and economical than traditional FDM systems.
- Why Was FDM Used First?
- How Successful Was FDM?
- How Did Analog Telephone Hierarchies Work?
- What Were the Limitations of FDM?
- What Changed During the 1960s?
- What Is Pulse-Code Modulation?
- Why Does Digital Speech Favour TDM?
- Why Is TDM Simpler?
- What Happened to Noise?
- Why Was This So Important?
- How Did Digital Switching Change Networks?
- Why Was TDM Better Suited to Optical Fiber?
- Did Digital Systems Use Less Bandwidth?
- Why Was Network Management Easier?
- What Role Did SONET and SDH Play?
- Did FDM Disappear Completely?
- Why Was the Transition So Successful?
- What Can Engineers Learn from This Transition?
- Why Is This Transition Important?