Gsm Modem based IVRS System

Project code:-E83 Project Cost:- INR:- Rs.10000/- USD:- 250$

Gsm Modem based IVRS System

This project is an enhancement to my previous project where a land line connection was required to be connected to the project to make it work . Many students from different colleges complaint that their college dose not provide the land line connection
SO this project is based on the gsm modem (SIM 300 or similar ).Other IVRS features are same as before
The mentioned project is based on the world’s most powerful Intel controller can switch on/off devices using your mobile phone or land line phone. FOUR loads can be connected to the four relays .

Gsm Modem based IVRS System Block DiagramGsm Modem based IVRS System Block Diagram

Application: this project could be used for variety of purposes where you want to control devices remotely.
A) Suppose you own a partnership company with three or more partners ,your business require you to travel frequently. You have a server in your office And nobody else other than the partners , should operate this server. At the same time you do not want to keep your server always ON .In that case this device comes to your service . Only requirement for this device is a GSM MODEM connection and of course power supply

B) You can switch ON this server by dialing THIS MODEM number from any where in the world .

C) THE device can only be switched ON or OFF from the owner MOBILE number. It will not respond to other call.

D) Thus it provide auto security by checking the valid owner user call.


So when valid user calls ,he will listen ‘please enter the channel number’ pressing 1&1, from your mobile phone you get message ‘requested channel is on’ or 1&0, ‘requested channel is off’. Press 1&2 to know the status of previously on or off channels similarly with all the four channels same combinations applies

This was one example of this device similarly this could be used to control or switch on any automatic process control machinery . Electric grid could be controlled remotely. Or automatic production machinery could be controlled even during odd hours with your mobile phone.
This device has the following blocks
1.GSM modem Sim 300 or Sim900 or any similar
2. Dtmf decoder ic 8870 ic6
3. Microcontroller circuit the central processor 89c51 IC2
4. Speech circuit IC4, AP89042 where all the messages are stored
5. IC5 MAX 232 for RS232 level conversion
6. Amplifire circuit ic IC5, LM386
7. Driver circuit where 4 relays where the loads will be connected.
8. Power supplay circuit IC1, 7805,bridge rectifires D1-D4
Capacitor C1 , C2 and C3.

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