Listing 3: 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) {v.visit(this);}
    
    String configurationString = null;
}