| 摘要 |
<p>Disclosed is a system (100, 204) that monitors the signal strength of each transmission by a node on a LAN cable (118) of a local area network and determines the location of the node sending the signal. This system has a monitor (112, 204) at each end of the LAN cable (118), with one of the monitors typically being located in a computer node (100) attached to the cable (118). When an information frame (302) is sent on the cable (118), each of the monitors (112, 204) records the signal strength of the frame preamble (304) and the source address (310) contained within the frame (302). The distance to the node from a first end of the cable is calculated based on the signal strengths. A LAN collision trap circuit (130) transmits a pseudo frame signal, of maximum length, periodically and monitors any collision or jam signals that occur during the pseudo frame. <IMAGE></p> |
