How Does A Cordless Telephone Work?

Group Leader: Matthew Roaeh

Team Members: Dulce EncisoVeronica MahoneyWilliam MarouesFanny VongdaraKrystaelynne Sanders

Engineering 1011Dr Helen Zong

Agenda

•User expectations;•Components;

▫Speaker▫Microphone▫Power: Battery, phone line, etc…▫Keypad/Dial tones

•Who’s involved in the process?•Questions;

1. What are users’ expected functions?•Staying in contact with individuals•Dependability/quality of

incoming/outgoing calls•Old vs. New technology

▫PSTN (Public Switched Telephone Network)

▫Wireless, Caller ID, Conference call, speakerphone, etc…

2. Components

•Speaker•Microphone•Power•Keypad

•The speaker:▫Diaphragm;▫Magnet;▫Copper Coil;

•The microphone:▫Diaphragm;▫Magnet;▫Copper Coil;

•Power:▫5 – 10 volts▫ Battery-powered▫Phone line-powered▫Old vs. new requirements

•Keypad:▫Call different phones▫Tone vs. Pulse▫3Khz signal

Who’s involved in the process?

Mechanical

Engineering Industrial

Engineering Electrical

Engineering Chemical

Engineering

Engineering Disciplines

Mechanical Engineering - Industrial Equipment and Machinery

Industrial Engineering – Development and the improvement of Materials

Electrical Engineering- Industrial Electronics,

Power Engineering .. ..Electronics Engineers

Chemical Engineering- Plastics

Other Types Are: Energy Engineering

Technology Systems

Materials Engineers

Questions?

References/Works Cited• Speaker Pic:http://itsi.concord.org/artwork/Teemss2_images/Units/u01_i02/speaker-diag/u01_i02_web_speaker-diag.png• Microphone Pic:http://www.mediacollege.com/audio/microphones/dynamic.html