How to use RJ11 connect with arduino mega board?

Other Hardware General Electronics
1

Dear Expert,

I need some advice which RJ11 cable (telephone jack) to connect to arduino mega board & GSM board ?
My intention is able to speak voice when there is incoming call.
Please see the attached pic of RJ11 telephone jack.

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2

So as I read it, you are asking how to connect a vacuum cleaner to your washing machine.

Well, essentially the same question. :roll_eyes:

3

My intention is able to speak voice when there is incoming call.

There are a lot of other things to consider and design first before you get down to connecting the telephone jack. The phone jack is the last brick of the wall..

I suggest you start reading about things like audio amplifiers, interfacing with the phone line (subscriber line interfacing circuits) , voice modems etc.

And above all, write down in detail your exact requirements and goals of the project.