Topics: Printed circuit board, Power supply, RS-232 Pages: 30 (8303 words) Published: May 16, 2013
CHAPTER 1 INTRODUCTION Now-a-days every institution needs automation. As a part of college automation, we have decided to do a project “voice interactive system for college automation”. Our project allows the user to know the student’s attendance and marks quickly through the telephone line without the intention of the college authority. In the hardware side embedded system has been used. The microcontroller controls the whole hardware. Telephone line is used for communication purpose. Visual basic has been used for software programming. Presentation in the class and outcome of the university are made reachable to the parents by our project. It will be very obliging to the parents to be acquainted with their son’s/daughter’s recital in the college. What is IVRS?

Interactive Voice Response (IVR) is a software application that accepts a combination of voice telephone input and touch-tone keypad selection and provides appropriate responses in the form of voice, fax, callback and e-mail. IVR is usually part of a larger application that includes database access. An IVR application provides pre-recorded voice responses for appropriate situations, keypad signal logic, and access to relevant data, and potentially the ability to record voice input for later handling. Using computer telephony Integration (CTI), IVR applications can hand off a call to a human being who can view data related to the caller at a display. Interactive Voice Response (IVR) systems allow callers to get access to information without human intervention. Thus callers hear a pleasant and cheerful voice 24-hours a day, 7 days a year without any attendant human fatigue. Since even the cost of the call is borne by the caller, apart from the one-time installation cost, there is no running expense for the company who deploys the IVR systems. Another advantage to the company is that it would otherwise be impossible to handle high loads of callers, both in terms of time, and the cost of the large number of individuals that it would require.

IVRS for an Educational Institution
An IVRS is an exemplary innovation in the area of voice assisted browsing and data retrieval on telephone, data that contains information of interest and has straight relevance to the user. This application software allows full resource sharing and integration with the existing database of EIMS TM, Our Software solution for the complete computerization of Educational Institutions. The software first converts the data into a voice format and then sends it on to the telephony network.


Fig. 1.1) Block diagram of IVRS (For college database management)


1. Basic Microcontroller based Hardware
_ To interface Telephone line
_ To provide various control signals
_ Give commands serially to PC
2. Telephone Line Interfacing Circuit
_ Ring Detection Circuit
_ Protection Circuit
3. DTMF Decoder Circuit
_ To detect DTMF Pulses on telephone line
4. Audio Amplifier (optional)
_ To drive PC Sound Card audio output

1. Basic Application Software: for Microcontroller (Using Keil Compiler) _ I/O Port functionality
_ DTMF Decoder 8870 Driver
_ Serial Communication Driver
_ Real Time Application Support
2. PC Side: Voice interactive Response software (Using Visual Basic) _ Student Database
_ Audio Output Support
_ Serial Communication Driver

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