6.0 Introduction to Networks
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6.1 Network Fundementals
This Unit describes some of the basic principles that have applied to networks, from the earliest days of voice communication to the more complex networks of today. These principles include 2-wire and 4-wire transmission, network types, switching and routing, circuit switching, packet switching, management, and applications. This Unit provides the context for many other Units.
6.4 Cellular Wireless Systems - A Guide
This Unit provides an overview of the origins of cellular wireless and of the various generations of systems around the world. These global developments cover a bewildering range of acronyms that are set in context. This Unit is mainly historical and does not describe how the systems work but aims to set the scene for other Units on specific aspects.
6.5 GSM and 3G Cellular
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6.7 Digital Circuit-Switching
Digital switch blocks form the heart of digital local, trunk and international telephone exchanges, as well as digital crossconnect systems. This Unit describes digital circuitswitching techniques and shows how they are being used in modern exchange systems.
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6.8 An Introduction to IP Networks
This Unit introduces readers to the basic concepts and terms in IP networking, covering the fundamental principles of packet switching, through to the devices, protocols, technologies and applications used to create an IP network.
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6.13 PCM and Voice Coding
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