Overview of Telecommunications ENGR 475 Harding University August 22, 2006 Jonathan White

General Overview 2 tests 2 tests 1 comprehensive final 1 comprehensive final 10 – 12 homework assignments 10 – 12 homework assignments 1 will be a program 1 will be a program A few quizzes A few quizzes 1 notebook with notes, hw, tests, etc… 1 notebook with notes, hw, tests, etc… 1 project 1 project Make a telephone Make a telephone Will start in class Will start in class 1 report 1 report 3 pages, choose your own topic, may present 3 pages, choose your own topic, may present

Class Design 1/3 – From the book, general information, PowerPoint / on board. Don’t need to write down information from the PowerPoint Don’t need to write down information from the PowerPoint Test questions and homework will be general knowledge: Test questions and homework will be general knowledge: What is CDMA used for? What is CDMA used for? What does LEC stand for? What does LEC stand for? What revolution did SS7 bring about? What revolution did SS7 bring about? Homework questions will come from the back of each chapter Homework questions will come from the back of each chapter Fairly easy if you’ve read the chapter Fairly easy if you’ve read the chapter

Class Design 1/3 – Working Telecommunications math- like problems: 1/3 – Working Telecommunications math- like problems: Sampling, signal to noise ratio, Sampling, signal to noise ratio, Line encoding, multiplexing, line speeds Line encoding, multiplexing, line speeds Traffic engineering, Erlang-B calculations, busy probabilities Traffic engineering, Erlang-B calculations, busy probabilities Queuing theory (a little) Queuing theory (a little) Notes and worked examples will all be on the board. Notes and worked examples will all be on the board. You must write this down You must write this down

Class Design 1/3 new Telecommunications information: 1/3 new Telecommunications information: Some from book Some from book Some from the Internet Some from the Internet Mix of general knowledge and problems Mix of general knowledge and problems Topics: Topics: DSL, cable modems, cellular phones, Bluetooth, WAP, 3G wireless, fiber phone systems, RFID, VOIP. DSL, cable modems, cellular phones, Bluetooth, WAP, 3G wireless, fiber phone systems, RFID, VOIP. Any other topics that you may be interested in? Any other topics that you may be interested in?

Class Design Hopefully, we will do a mix of each 3 areas every couple class periods. Hopefully, we will do a mix of each 3 areas every couple class periods. Difficulty of class Difficulty of class Attendance Attendance Purpose of class Purpose of class

Telecom History What is voice What is voice Telegraph Telegraph Radio Radio Telephone Telephone AT & T years AT & T years Digital communications Digital communications Mobile communications Mobile communications Internet Internet

Voice Mediums Mediums Bandwidth Bandwidth Frequencies Frequencies Sampling, signal to noise ratio Sampling, signal to noise ratio Usage rates Usage rates

Telephone Network / Set Lots to memorize: Lots to memorize: LATA, CLEC, LEC, CO, PSTN, tip, ring, PBX, simplex, duplex LATA, CLEC, LEC, CO, PSTN, tip, ring, PBX, simplex, duplex

Analog vs. Digital Noise, amplifier vs repeater, types of signaling Noise, amplifier vs repeater, types of signaling Why digital is not always better than analog Why digital is not always better than analog Differences between circuit and packet switching Differences between circuit and packet switching

Information on Telephone Industry Types of carriers Types of carriers Long distance, local, 1-800, pay phone, etc.. Long distance, local, 1-800, pay phone, etc.. Types of telephone lines/trunks Types of telephone lines/trunks PBX – Private Branch Exchanges PBX – Private Branch Exchanges Newer telephone technologies Newer telephone technologies Automated call answering Automated call answering Fax processing Fax processing OCR OCR

T Carrier System T1 and T3 architectures T1 and T3 architectures Framing and CRC Framing and CRC

Math behind Ethernet Pure Aloha Pure Aloha Shared medium technologies Shared medium technologies Speed over various mediums Speed over various mediums

Other Voice/Data technologies If time permits… If time permits… FDDI, Token Ring, Frame Relay, ISDN FDDI, Token Ring, Frame Relay, ISDN ATM ATM Cells Cells Cell formats Cell formats Public switches Public switches SS7 SS7

New Technologies DSL/Cable Modem DSL/Cable Modem Wireless cellular phones Wireless cellular phones WAP WAP Downsides Downsides 3G wireless 3G wireless SONET SONET VOIP VOIP RFID RFID Bluetooth Bluetooth Legal issues involving telecommunications Legal issues involving telecommunications