1. How Does A Cordless Telephone Work? Group Leader: Matthew Roaeh Team Members: Dulce Enciso Veronica Mahoney William Maroues Fanny Vongdara Krystaelynne Sanders Engineering 1011 Dr Helen Zong

2. Agenda User expectations; Components; Speaker Microphone Power: Battery, phone line, etc… Keypad/Dial tones Whos involved in the process? Questions;

3. 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…

4. 2. Components Speaker Microphone Power Keypad

5. The speaker: Diaphragm; Magnet; Copper Coil;

6. The microphone: Diaphragm; Magnet; Copper Coil;

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

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

9. Whos involved in the process? Mechanical Engineering Industrial Engineering Electrical Engineering Chemical Engineering

10. 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

11. Questions?

12. 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