Use KDtele component to find modem

Question

I am using the KDtele component to make a dialer program

I use this code to find the modem in my PC and add it to a combo box

Int32 lNum = 0;
string lName = "";
for (lNum = 0; lNum < axKDPhone1.NumberOfLines - 1; lNum++)
{
    axKDPhone1.GetLineName(lNum, ref lName);
    if (lName != null)
    {
        comboBox1.Items.Add(lName);
    }
}

But it does not show my modem.

My modem is a Zoltrix, 56k voice modem.