Listing 15: ZoomModem.java

public class ZoomModem 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
        {
            ZoomModemVisitor zv = (ZoomModemVisitor)v;
            zv.visit(this);
        }
        catch(ClassCastException e)
        {
        }
    }
    
    int configurationValue = 0;
}