Overview of Overview of TelecommunicationsTelecommunications

ENGR 475ENGR 475Harding UniversityHarding University

August 22, 2006August 22, 2006

Jonathan WhiteJonathan White

General OverviewGeneral Overview 2 tests2 tests 1 comprehensive final1 comprehensive final 10 – 12 homework assignments10 – 12 homework assignments

1 will be a program1 will be a program A few quizzesA few quizzes 1 notebook with notes, hw, tests, etc…1 notebook with notes, hw, tests, etc… 1 project1 project

Make a telephoneMake a telephone Will start in classWill start in class

1 report1 report 3 pages, choose your own topic, may present3 pages, choose your own topic, may present

Class DesignClass Design

1/3 – From the book, general information, 1/3 – From the book, general information, PowerPoint / on board.PowerPoint / on board.

Don’t need to write down information from the Don’t need to write down information from the PowerPointPowerPoint

Test questions and homework will be general Test questions and homework will be general knowledge: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 Homework questions will come from the back of each chaptereach chapter

Fairly easy if you’ve read the chapterFairly easy if you’ve read the chapter

Class DesignClass Design

1/3 – Working Telecommunications math-1/3 – Working Telecommunications math-like problems:like problems:

Sampling, signal to noise ratio, Sampling, signal to noise ratio, Line encoding, multiplexing, line speedsLine encoding, multiplexing, line speedsTraffic engineering, Erlang-B calculations, busy Traffic engineering, Erlang-B calculations, busy

probabilitiesprobabilitiesQueuing theory (a little)Queuing theory (a little)

Notes and worked examples will all be on Notes and worked examples will all be on the board.the board.You must write this downYou must write this down

Class DesignClass Design

1/3 new Telecommunications information:1/3 new Telecommunications information: Some from bookSome from book Some from the InternetSome from the Internet Mix of general knowledge and problemsMix of general knowledge and problems

Topics:Topics: DSL, cable modems, cellular phones, Bluetooth, DSL, cable modems, cellular phones, Bluetooth,

WAP, 3G wireless, fiber phone systems, RFID, VOIP.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 DesignClass Design

Hopefully, we will do a mix of each 3 areas Hopefully, we will do a mix of each 3 areas every couple class periods.every couple class periods.

Difficulty of classDifficulty of class

AttendanceAttendance

Purpose of classPurpose of class

Telecom HistoryTelecom History

What is voiceWhat is voice TelegraphTelegraph RadioRadio TelephoneTelephone AT & T yearsAT & T years 19961996 Digital communicationsDigital communications Mobile communicationsMobile communications InternetInternet

VoiceVoice

MediumsMediumsBandwidthBandwidthFrequenciesFrequenciesSampling, signal to noise ratioSampling, signal to noise ratioUsage ratesUsage rates

Telephone Network / SetTelephone Network / Set

Lots to memorize:Lots to memorize:LATA, CLEC, LEC, CO, PSTN, tip, ring, PBX, LATA, CLEC, LEC, CO, PSTN, tip, ring, PBX,

simplex, duplexsimplex, duplex

Analog vs. DigitalAnalog vs. Digital

Noise, amplifier vs repeater, types of Noise, amplifier vs repeater, types of signalingsignaling

Why digital is not always better than Why digital is not always better than analoganalog

Differences between circuit and packet Differences between circuit and packet switchingswitching

Information on Telephone IndustryInformation on Telephone Industry

Types of carriersTypes of carriersLong distance, local, 1-800, pay phone, etc..Long distance, local, 1-800, pay phone, etc..

Types of telephone lines/trunksTypes of telephone lines/trunksPBX – Private Branch ExchangesPBX – Private Branch ExchangesNewer telephone technologiesNewer telephone technologies

Automated call answeringAutomated call answeringFax processingFax processingOCROCR

T Carrier SystemT Carrier System

T1 and T3 architecturesT1 and T3 architecturesFraming and CRCFraming and CRC

Math behind EthernetMath behind Ethernet

Pure AlohaPure AlohaShared medium technologiesShared medium technologiesSpeed over various mediumsSpeed over various mediums

Other Voice/Data technologiesOther Voice/Data technologies

If time permits…If time permits…FDDI, Token Ring, Frame Relay, ISDNFDDI, Token Ring, Frame Relay, ISDN

ATMATMCellsCellsCell formatsCell formatsPublic switchesPublic switches

SS7SS7

New TechnologiesNew Technologies DSL/Cable ModemDSL/Cable Modem Wireless cellular phonesWireless cellular phones WAPWAP

DownsidesDownsides 3G wireless3G wireless SONETSONET VOIPVOIP RFIDRFID BluetoothBluetooth Legal issues involving telecommunicationsLegal issues involving telecommunications