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Hello, i have attached a circuit diagram... BUT I am going to use a mobile phone in place of the landline phone used in that circuit...
Please suggest me what changes can i make to the circuit so that i can use use mobile phone there.....
You can set autoanswer option in phone to answer just on particular phone numbers (yours) this will prevent someone else to press some digits and activate/deactivate some relays.
Use handsfree headspeakers for input to your circuit. Input section of your circuit should be modified to accept lower voltage signal from handsfree headspeaker.
You can see 8870 datasheet, there is circuit example.
Or see this circuit (all channel have 3 digit code for On and Off of each channel) and try to adjust yours input section to this :
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