1. Copyright 1998, S.D. Personick. All rights reserved1 Telecommunications Networking I Lecture 1 Overview of Telecommunications Networking I-II

2. Copyright 1998, S.D. Personick. All rights reserved2 Telecommunications Networking Sending and receiving messages (smoke signals, flashes of light, telegraph, teletype, facsimile, voice mail, text E-mail, multimedia E-mail) Real-time conversations and collaborative work (telephone, 2-way radio, amateur radio, video teleconferencing, multimedia teleconferencing) Accessing stored information (FTP, WWW) Networked information systems (telnet, client- server, distributed computing environments)

3. Copyright 1998, S.D. Personick. All rights reserved3 Telecommunications Networking How to communicate in efficient, predictable, reliable, and useful ways? -Representing information as a “signal” -Defining fidelity of reception -Signals in the presence of noise, distortion and interference -Point-to-point communication systems -Switched networks

4. Copyright 1998, S.D. Personick. All rights reserved4 Overview of Telecommunications Networking I Overview of telecommunications Networking I-II Information (voice, audio, images, video), and signals that represent information Signals in noise, measures of quality of communication Wire-pair and coaxial cable, optical fiber, and wireless transmission systems (link layer) Circuit switching and circuit-switched telecommunications networks

5. Copyright 1998, S.D. Personick. All rights reserved5 Overview of Telecommunications Networking II Wireless systems and networks: peer-to-peer communication using a shared “ether”, broadcast systems, cellular/ PCS, 2-way satellite systems Local area networks (packet switching) Internet Next generation systems, networks, issues and applications