379/221.01, 379/221.12, 379/224, 379/232, 379/221.08, 379/901, 379/221.14, 379/219, 379/221.03, 379/221.09, 379/221.02, 379/230, 379/220.01, 379/225, 379/234 View Patent Images: Download PDF 6567514 US Patent References: 6480595 Method of communication through leased line in virtual...