1. Interactive Voice Response System For College Automation (IVRS)

2. Introduction What are interactive voice response (IVR) systems?
The Interactive Voice Response (IVR) System serves as a bridge between people and computer databases by connecting the telephone network with the database. The telephone user can access the information from anywhere at anytime simply by dialing a specified number and following an on-line instruction when a connection has been established. The IVR system uses pre-recorded or computer generated voice responses to provide information in response to an input from a telephone caller

3. Interactive Voice Response System For College Automation (IVRS)
Now-a-days every institution needs automation. As a part of college automation,. In the hardware side embedded system has been used. A 20 pin microcontroller 89C2051 is used because of its compatibility with our hardware. This 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

4. CIRCUIT

5. SCHEMATIC 

6. Power supply: In this system we are using 5V power supply for microcontroller of Transmitter section as well as receiver section. We use rectifiers for converting the A.C. into D.C and a step down transformer to step down the voltage. The full description of the Power supply section is given in this documentation in the following sections i.e. hardware components.

7. MICRO CONTROLLER (AT89S51)The AT89S51 is a low-power, high-performance CMOS 8-bit microcontroller with 4K bytes of in-system programmable Flash memory. The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry standard 80C51 instruction set and pin-out. The on-chip Flash allows the program memory to be reprogrammed in-system or by a conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU with in-system programmable Flash on a monolithic chip, the Atmel AT89S51 is a powerful microcontroller which provides a highly-flexible and cost-effective solution to many embedded control applications.

8. Voice IC (APR 9600): This device will receive the signal of human voice through mike. It is having 28 pins on its IC. It consists of 8 message lines (or channels) to which we can give a voice message and it can operate in any one of two modes (recording and playback). The supply pins are connected to power supply circuit. Analog (AGND) and digital ground (DGND) pins of voice decoder IC are connected to VSS of power supply. Analog power supply. All the voice channels pins are connected to the port1 of microcontroller.

9. DTMF (DUAL TONE MULTI FREQUENCY) The M-8870 is a full DTMF Receiver that integrates both band split filter and decoder functions into a single 18-pin DIP or SOIC package. Manufactured using CMOS process technology, the M-8870 offers low power consumption (35 mW max) and precise data handling. Its filter section uses switched capacitor technology for both the high and low group filters and for dial tone rejection.

10. EEPROM 24C02 The project ‘Smart Card based Library Management System’ makes use of smart card technology to provide authentication. The Smart card is taken as a means of authentication with the details like student name, id of book being taken by the student etc stored on it. But in order to give id s to all the books available a memory is required. This requirement is fulfilled by making use of EEPROM.

12. SOFTWARE

13. Other future application of IVRS
Airline / Railways / Bus Stations Arrival/Departure timings Reservation Status Tele-booking.
Banks/Financial Institutions Auto attendant Account status Balance Amount in the account Loan information etc.
Telemarketing Market divisions of Industrial units
Tele-survey Market research organizations
Hotels Auto attendant Reservation Room availability status.
Retail stores Tele-ordering / Tele-information.
Stock market Shares information.