A study on Implementation of a Teleremote Control System Using Telephone Lines : 전화선을 사용한 Teleremote 컨트롤 시스템의 연구

다국어 초록 (Multilingual Abstract)

ABSTRACT
Khalifa Eltayeb Khalifa Mustafa
Dept of electronics Eng
Chongju University
Directed by professor
Yi, Cheon Hee
This document is a compilation of all the study and technical details of the design and testing of the system design for "The Teleremote Control System." which represents the remote control using the Telephone Line and the Microcontroller. The system would give a homeowner the capability to remotely control various systems in their home (lights, alarm, heating/cooling sensors) through any touch-tone telephone. The owner simply connects the system to devices in the house and to a phone line. To alter any of the attached devices, he/she simply places a call to that phone line. After the system picks up and the owner enters his PIN, he may continue through a tone driven menu and control any of the household devices that are connected to the system.
With this system, the user will be able to run On or OFF a switch which then enables a teleremote control of an appliance through the phone line or a touch tone pad under control of the microcontroller.

목차 (Table of Contents)

• 목차
• ABSTRACT = I
• Acknowledgement = II
• Dedication = III
• Table of contents = IV
• I. Introduction = 1
• 2. Telephony system = 3
• 2.1 Intoduction to telephony system and phone line = 3
• 2.2 Phone lines types = 6
• 2.3 The Speech Network = 6
• 2.4 The Dial = 8
• 2.5 Telephone Line Basics = 12
• 2.5.1 Line Voltages and Currents = 14
• 2.5.2 Audio Signals and Modulation = 15
• 2.5.3 Telephone line technical details = 17
• 2.5.3.1 Telephone line frequency response = 17
• 2.5.3.2 Telephone line details in different countries = 17
• 2.6 Ring Detection circuitry = 18
• 2.6.1 What is the Ring Signal? = 19
• 2.6.2 Ring Detection circuits and modem = 20
• 2.6.3 The Ringers = 24
• 2.7 DTMF (Dual tone Multiple Frequency) = 27
• 2.7.1 What's the DTMF? = 27
• 2.7.2 Methods for generating DTMF tones = 28
• 2.7.3 DTMF Encoding/Decoding = 31
• 2.7.4 DTMF generating recommendation = 33
• 2.7.5 The Goertzel Algorithm = 34
• 2.7.5.1 Basic Goertzel and an optimized Goertzel = 34
• 2.7.5.2 An optimized Goertzel = 37
• 3. Teleremote system design consideration = 44
• 3.1 The block diagram = 44
• 3.2 Ring detection and call handling circuits = 46
• 3.3 DTMF recognition = 47
• 3.4 Microcontroller Functionality = 48
• 3.5 Some telephone line interface consideration = 48
• 4. Design details = 49
• 4.1 Ring Detection Circuit = 49
• 4.2 Call Handling Circuit = 50
• 4.2.1 Inputs = 50
• 4.2.2 The call handling output = 51
• 4.2.3 How it works? = 51
• 4.2.4 Call handling circuit = 53
• 4.3 DTMF Decoding = 54
• 4.3.1 DTMF decoding circuit = 56
• 4.4 Software consideration = 58
• 4.4.1 Software flow chart = 58
• 4.4.2 Software functions = 59
• 4.4.3 Interface with the microntroller = 59
• 4.4.3.1 Input = 60
• 4.4.3.2 Output = 60
• 4.4.3.3 Microcontroller interface circuit block diagram = 62
• 5. Design verification = 63
• 6. Conclusion = 65
• References = 66