How to make caller id in c#.net

Question

I know this is answered question however I want to know hardware required and how to setup.

I am trying to build a take-out\'s delivery system wherein users cal

Answer 1

If you are using a phone and fax modem, just plug-in your telephone line into the modem.

Next on your windows form drag-n-drop a SerialPort control and initialize it.

    this.serialPort1.PortName = "COM3"; 
    this.serialPort1.BaudRate = 9600;
    this.serialPort1.DataBits = 8;
    this.serialPort1.RtsEnable = true;
    this.serialPort1.DataReceived += serialPort1_DataReceived;
    this.serialPort1.Open();      

Pass the following command to modem in order to activate Caller-ID

    this.serialPort1.WriteLine("AT#cid=1" + System.Environment.NewLine);

Handle its DataReceived event and display the received data

     void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)
     {
          richTextBox1.Text += this.serialPort1.ReadLine();          
     }

Output:

RING               //On 1st Ring
DATE = xxxxx       //On 2nd Ring
TIME = xxxx
NMBR = xxxxxxxxx

RING               //On 3rd Ring    
RING               //On 4th Ring

P.S. If the telephone line sends DTMF tones as Caller-ID then you need DTMF to FSK converter to detect the number, or else you will receive the rings but not the number.