PDH, SDH, OTN & ASON for Telecom Transmission

Understand PDH (Plesiochronous Digital Hierarchy), Synchronous Digital Hierarchy (SDH)& Optical Transport Networks (OTN)

Welcome to the course "PDH, SDH, OTN & ASON for Telecom Transmission". Telecom Transmission is the backbone of modern global telecommunications. Multiplexing is used to send multiple signals over a common high capacity transmission media, such as copper, microwave link or optical fiber. Whether you're an engineer, network professional, or a student eager to master telecom transmission technologies, this comprehensive course is designed to take you from foundational concepts to advanced optical networking.

You’ll begin with the basic principles of multiplexing and the evolution of telecom exchanges, moving through fiber optics fundamentals, then mastering Synchronous Digital Hierarchy (SDH). Finally, you'll explore the world of Wavelength Division Multiplexing (WDM) and Optical Transport Networks (OTN), understanding how high-speed networks are built and maintained today.

Course Outline:

Section 1: Introduction

• What is Multiplexing in Telecom Transmission Networks?

• Frequency Division Multiplexing (FDM) and its Standard Hierarchy

• Digital Exchanges: Analogue to Digital Conversion

• E-1 and T1 standard for TIme Division Multiplexing in Digital exchanges

• Plesiochronous Digital Hierarchy (PDH)

Section 2: The Physical Transmission Medium

• What is Telecom Transmission Medium?

• Microwave Communication Overview

• What is Optical Fiber Communication?

• Total Internal Reflection as basic Principle of Optical Communication

• Types Of Optical Fiber

• Multimode Step Index Fiber and Modal Dispersion

• Multimode Graded Index Fiber

• Single Mode Optical Fiber

• Attenuation And The Wavelength Windows Used For Optical Communication

Section 3:Synchronous Digital Hierarchy (SDH)

• Disadvantages of PDH

• Introduction to Synchronous Digital Hierarchy (SDH)

• SDH Bit Rates

• SDH Accommodates the Existing PDH Signals as its Input

• Basic SDH Operations & Overall Multiplexing Structure For PDH to SDH Conversion

• Synchronous Transport Module (STM)-1 Frame Format

• E4 to STM-1 Conversion in SDH

• E3 to STM-1 Conversion in SDH

• E1 to STM-1 Conversion

• Network Elements of SDH:

  • Regenerator

  • Multiplexers: Terminal & Add-Drop Multiplexers

  • Digital Cross-Connect (DXC)

• SDH Network Topology Types:

  • Point to Point Network Topology

  • Point-to-Multipoint Network Topology

  • Mesh Network Topology

  • Ring Network Topology

• SDH Overheads Classification

• Understanding main sections of SDH Path

• Regenerator Section Overhead (RSOH) Information

• AU Pointer (Administrative Unit Pointer) Information

• Multiplex Section Overhead (MSOH) Information

• Automatic Protection Switching: Linear Protection Mechanism

• Unidirectional Ring Protection-Line Switching

• Unidirectional Ring Protection-Path Switching

• Bidirectional Ring Protection-Line Switching

Section 4:Using SDH Technology with Wavelength Division Multiplexing (WDM)

• Wavelength Division Multiplexing (WDM) Concept

• Advantages of WDM Technology

• CWDM Vs DWDM Systems

• Optical Supervisory channel (OSC)

• Optical Add Drop Multiplexer (OADM)

Section 5:Optical Transport Network (OTN)

• Why Transition from SDH to OTN?

• What is an Optical Transport Network (OTN)?

• Migration to Packet Transport Networking

• Why not IP directly over WDM?

• OTN Network Interface & 3R Regeneration Function

• Client Signal Mapping into Optical Channel

• Optical Channel (OCh) Structure

• OTN Layered Architecture

• Initial OTN Data Rates

• OTN Multiplexing Structure

• What is Optical Transport Module (OTM)

• Optical Transport Modules Types

  • OTM-n.m(Full Function OTM) Signal

  • OTM-nr.m (Reduced Function OTM) Signal

  • OTM-0-m (Single Wavelength OTM) signal

• ODU0-Efficient Transport of 1GbE

• ODUflex-Flexible Optical Channel Data Unit

• Commonly Used ODU Containers

• OPU Overhead Bytes Explained

• ODU Overhead Bytes-Path Monitoring (PM)

• ODU Overhead Bytes-Tandem Connection Monitoring (TCM)

• Other ODU Overhead Bytes

• OTU overhead Bytes