Listing 14: HayesModem.java

public class HayesModem implements Modem
{
    public void dial(String pno){}
    public void hangup(){}
    public void send(char c){}    
    public char recv() {return 0;}
    public void accept(ModemVisitor v)
    {
        try
        {
            HayesModemVisitor hv = (HayesModemVisitor)v;
            hv.visit(this);
        }
        catch (ClassCastException e) 
        {
        }
    }
    
    String configurationString = null;
}