Some advanced drivers support eavesdropping. The eavesdropping feature is designed to allow a new system to run in parallel to an existing system.
Eavesdropping works by allowing an existing system to maintain control of the outstations, while a new server processes the data that the outstations report to Geo SCADA Expert.
The existing system communicates with the outstations via one or more channels. Each channel consists of a receive line (Rx) and a transmit line (Tx)—the Rx line at the Geo SCADA Expert server connection is the Tx line at the outstation connection (the Geo SCADA Expert server receives the data that is transmitted from the outstations).
Special serial cables are used to connect the new server to the line(s) at the existing server’s connection. The eavesdropping arrangement differs, depending on the drivers that are used on your system.
For more information on the two arrangements, see the topics that are listed in the gray footer section at the bottom of this topic. Select the relevant entry to display the topic that you require.
Refer to the relevant driver guide for information on which arrangement is required by that particular protocol.