Telecom Basics

• Voice Sampling
• Local Loop
• Multiplexing
• T1 Frame
• Digital TDM Hierarchy
• Problems with Leased Lines
• X.25 Overview
• Virtual Circuits
• X.25 Exchange
• Frame Relay: Key Features
• Frame Relay Exchange
• Discard Control
• Integrated Digital Networks
• Int. Service Digital Network
• ISDN Access Interfaces
• SONET
• SONET Protocols
• Physical Components
• Signal Hierarchy
• Automatic Protection Switching
• Scrambling

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