The customer monitors high-speed 1,200-baud modems that communicate with traffic lights at various intersections. Each phone line carries 4 channels with 1 signal each. Manufacturing deficiencies that typically occur are a slow modem transfer rate and packets that arrive too early or too late, thus missing the target time window. These deficiencies can be easily represented on a graphical display. In order to demonstrate potential problems rather than needing a daily service call, the customer would like to be able to electronically send the captured signal to the contractor who builds the modems.