Overview of the public switched telephone network pstn
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Overview of the (Public Switched Telephone Network) PSTN. Unit 1. Objectives. Describe the history and explain the basic parts and services of the PSTN Describe the evolution of the modern day PSTN.

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Unit 1

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Overview of the (Public Switched Telephone Network) PSTN

Unit 1


Objectives

  • Describe the history and explain the basic parts and services of the PSTN

    • Describe the evolution of the modern day PSTN.

    • Explain the basic parts of the PSTN, such as signaling, analog and digital waves, and call flow.

    • Explain PSTN Numbering Plans.

    • Describe and explain the various services and applications that the PSTN uses.

  • Explain the drivers behind convergence between voice and data networking

    • Describe the drivers behind the current convergence of voice and data networking.

    • Explain the proposed new PSTN infrastructure model.

  • Compare and contrast the differences between the PSTN and enterprise telephony

    • Identify the basic features of Enterprise Telephony.

  • Provide common Enterprise Telephony designs

    • Describe some of the more common Enterprise Telephony Designs.


Basic Four Phone Network


Physical Cable Between All Telephone Users


Centralized Operator: The Human Switch


Analog Waveform


Analog Line Distortion


Digital Line Distortion


Circuit Switching Hierarchy


DTMF


PSTN Call Flow


Circuit Switching vs. Packet Switching


H.323. Call Flow


Elements of Packet Telephony


VPN


PSTN Call Through a PBX


Number Translation Through a PBX


Tie-line Cost Comparisons


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